In chickens, comb shape is determined by alleles at two loci (R, r and P, p). A walnut comb is produced when at least one dominant allele R is present at one locus and at least one dominant allele P is present at a second locus (genotype R_ P_). A rose comb is produced when at least one dominant allele is present at the first locus and two recessive alleles are present at the second locus (genotype R_ pp). A pea comb is produced when two recessive alleles are present at the first locus and at least one dominant allele is present at the second (genotype rr P_). If two recessive alleles are present at the first and at the second locus (rr pp), a single comb is produced. Progeny with what types of combs and in what proportions will result from the following crosses?

a. RR PP × rr pp
b. Rr Pp × rr pp
c. Rr Pp × Rr Pp
d. Rr pp × Rr pp
e. Rr pp × rr Pp
f. Rr pp × rr pp

Answers

Answer 1

Answer:

a) All Walnut , Genotype - RrPp

b) Walnut : Rose: Single

1:1:2

Explanation:

Phenotype and their Genotype -

Walnut comb - R_ P_

Rose Comb - R_ pp

Pea Comb - rr P_

Single Comb  - rr pp

a) RR PP *  rr pp

All progenies will have genotype RrPp (Walnut Comb)

b) Rr Pp *  rr pp

RrPp (4), Rrpp (4), rrpp (8)

Walnut : Rose: Single

1:1:2


Related Questions

In which stage of the cell cycle does the cell die
A) interphase
B) mitosis
C) apoptosis

Answers

The short answer is that cell death by apoptosis in various phases of cell cycle depends on the cell-type and inducer/stimulus. Hematopoietic cells can undergo apoptosis at all stages of cell cycle as noted by Bertrand. However, mesenchymal or epithelial cells usually undergo apoptosis at the G1/S or G2/M phase of the cell cycle.

Which crop leaves soil with the lowest levels of nitrogen?

Answers

Answer:

cotton

Explanation:

Cotton crop leaves soil with the lowest levels of nitrogen.

What is a nitrogen?

Nitrogen is the chemical element with the symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at seventh in total abundance in the Milky Way and the Solar System.

Nitrogen is important to the chemical industry. It is used to make fertilizers, nitric acid, nylon, dyes and explosives. To make these products, nitrogen must first be reacted with hydrogen to produce ammonia. This is done by the Haber process.

Nitrogen is important to all living things, including us. It plays a key role in plant growth: too little nitrogen and plants cannot thrive, leading to low crop yields; but too much nitrogen can be toxic to plants [1]. Nitrogen is necessary for our food supply, but excess nitrogen can harm the environment.

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1. The expression of Hitchhikers thumb is due to recessive gene expression and you can express it. Use alphabet H. What is your genotype?

Answers

hh
Hope this helps :)

How do chemical weathering affect land formation?

Answers

Answer:

Chemical weathering erodes the land/basically sort of melts the land away due to the pollution in the rain.

Explanation:

Answer:

Chemical weathering changes the molecular structure of rocks and soil. ... Sometimes, chemical weathering dissolves large portions of limestone or other rock on the surface of the Earth to form a landscape called karst. In these areas, the surface rock is pockmarked with holes, sinkholes, and caves.

What climate condition occurs during El Niño?

dry heat throughout North America
>>warm water moving toward the coast of South America
heavy rain moving toward the coast of South America
flooding throughout North America

Answers

Answer: "warm water moving toward the coast of South America"

Explanation:the change in the temperature of the water in the Pacific ocean contributes to the rise in temperature in the air and on land as well. During El Niño, the temperature in the area of the tropical Pacific ocean increases, so there is usually a surge in wildfires and rainfall.

Answer:

the upper mate is correct

Who was credited with the discovery of the virus?

Answers

Answer:

Dmitri Ivanosky in 1892

Explanation:

please mark brainiest thank you

examples of mixed fertilizers ​

Answers

Mixed fertilizer in which the sum of the guaranteed analysis of total nitrogen (N), available phosphoric acid (P2O5), and soluble potash (K2O) totals less than twenty percent. Some examples of single fertilizers are: urea, ammonium sulphate, super sulphate (SP36), TSP, KCL.

What is dumping?
A.
Dumping is sending surplus products as aid to poor or disaster-stricken areas.
B.
Dumping is hoarding scarce goods to cause an increase in price.
C.
Dumping is disposing of food items that don’t meet state food standards.
D.
Dumping is exporting goods at prices that are lower than their value.

Answers

Answer:

C.?

Explanation:

Sorry if it wrong

1. The diagram below represents part of Earth's latitude-longitude system. 2 points
What is the latitude and longitude of point L?*
45°
30°
15° 0°
15° 30° 45°
30°
N
20°
10°

LI
10°
20°
30°
O (A) 5º E 30°N
(B) 5° N 30°E
(C) 5° W 30° S
O (D) 5° S 30°W

Answers

Answer:

I am not sure but the answer must be C

What happens after Telophase?
&
36/86
>
C

Answers

Answer:

The chromosomes begin to uncoil, which makes them diffuse and less compact. Along with telophase, the cell undergoes a process called cytokinesis that divides the cytoplasm of the parental cell into two daughter cells.

What are 3 examples of dna

Answers

Explanation:

An example of DNA is the chain of basic materials in the chromosomes of the human cell.

just check the photo dont worry that is correct

A)x-linked
B)No answer text provided
C)recessive
D)dominant

Answers

Answer:

D)dominant

Explanation:

The correct answer is D) dominant

Capturing energy is critical to
every environment because
without it producers are unable to
A. absorb water
B. make their own food
C. reproduce
D. recycle nutrients

Answers

Answer:

C. reproduce

Explanation:

For each of the following minerals, say what properties of the material make it important in carrying out it's particular function.
a. tar roads
b. iron bulgar bars
c. plastic furniture
d. metal jewellery
e. clay for building
f. cotton clothing

Answers

Answer:

1. Tar Roads: The qualities of Tar that makes it ideal for road construction are:

The tar-like material that is used for road construction is a combination  (emulsion) of water and liquid asphalt. It serves the purpose of permeating and closing up small lacerations in the existing pavement.

When the emulsion sticks to the "gravel" it reduces the potential for vehicles to skid on the road thus enhancing safety. The "gravel-like" emulsion is applied by rolling and sweeping.

Qualities of Tar are:

Adhesive: its the ability to stick to surfaces including materials such as gravel which it holds together makes it great for road construction;Waterproof: It is not water-soluble. Hence is not easily susceptible to the effects of running water. Resistant to High Temperature: The melting point of Tar is 54 degrees centigrade. The ground can heat up to 45 degrees celsius thus making Tar perfect for road construction as it can remain rigid even in the worst temperatures.

2. Iron Burglar Bars

Steel bars are made from iron. The qualities of steel which make it perfect for securing places and things are:

Strength; This is the ability to withstand breakage and or destruction.  Toughness: Steel is very tough and can not easily bend or break under static loads. Weldability: Most steel bars are actually welded together. Without this ability, steel probably would be useless as a material that can be used for protectionDurability: The only factor that degrades steel is rust. Rust happens when steel is exposed to oxygen which can be found in air and water.

3.) Plastic Furniture

The primary qualities of plastic that make them suitable for furniture are:

Chemical stability: It does not rust or degrade when exposed to weather elements such as oxygen, water, etc. Good impact resistance: Depending on its thickness, plastic can bear a lot of weight and can take a lot of impact without deforming or breaking Good transparency and wear resistance: Plastic can be made transparent. This quality is essential for aesthetic purposes and hence can be used for various kinds of good-looking furniture. As furniture, its surface does not come off like hence it's durability.Low thermal conductivity: This means that it can bear heat without transmitting it easily.  Ability to General formability, good coloring, low processing cost.

4) Metal Jewellery

One of the best metals for jewelery is Tungsten. This is so because it is more durable and stronger than any other kind of material that can be used for jewelery purposes. It is about ten times harder than 18K gold and about four times harder than titanium. Other materials that can be used are:

titaniumstainless steel and cobalt

5) Clay

In it's raw form, clay used for building might not be the best idea as it susceptible to water absorption and hence deformation which generally leads to a collapse of the structure. However, it becomes an excellent material of choice after it has been hardened into brick.

Brick is preferred in construction due to the following qualities:

hardnessHigh Compressive strength, Low Water AbsorptionFrost resistanceFireproofGreat Insulation

6) Cotton is usually preferred as the material of choice for most kinds of clothing due to the following qualities:

Softness. The cotton plant is soft and fluffy and results in a fabric often retains that soft feel. Durability: Its molecular structure makes it able to last very long. Absorbency: it is able to absorb moisture/water. Hence making it more comfortable than synthetic materials   High Dye Tolerance: Ability to hold dye well is an indespensable quality of a good fabric. You don't want to have a fabric whose colours are quick to fade. Breathability: This reduces is very important especially during summer or when the weather or environment is very hot.

Cheers

The tar is roads that have quantities to make them deal with the construction. The liquid is a mix of asphalt and can be adhesive and waterproof.

The iron bars are used for securing the place and things. plastic furniture is used to make suitable furniture and is used for chemical stability etc. The metal jeweler is of titanium, cobalt and stainless steel

Learn more about the following minerals.

brainly.com/question/26208691.

Dose Centipede have cells

Answers

Answer:

eveything that has organic material has cells, for example, rocks have molecules not cells

Explanation:

which of the following terms would blue eyes represent in an organism?

A. genotype
B. phenotype
C. appearance

Answers

Answer:

phenotype

Explanation:

Genotype is the term which is responsible for the blue eyes in an organism because it occurs due to changes in genes.

What is genotype?

The genotype of an organism refers to genes or genetic material of an organism. Genotype can also be refer to the alleles or variants an individual carries in a particular gene.

So we can conclude that genotype is the term which is responsible for the blue eyes in an organism because it occurs due to changes in genes.

Learn more about genotype here: https://brainly.com/question/22117

1. The diagram below represents part of Earth's latitude-longitude system
What is the latitude and longitude of point L?*
45°
30°
15° 0°
15° 30° 45°
30°
N
20°
10°

LI
10°
20°
30°
O (A) 5º E 30°N
(B) 5° N 30°E
(C) 5° W 30° S
O (D) 5° S 30°W

Answers

Answer:

The answer is option D hopefully this helps

A student is performing experiments on a particular substance. Which
statement is an observation of a chemical property of the substance?
O A. It melts.
O B. It burns.
O C. It floats.
O D. Electricity cannot pass through it.
Will give brainly if it’s correct but if ur gonna guess don’t answer

Answers

Answer:

of what substance??

Explanation:

Answer: it burns

Explanation: a p e x

What is point source pollution?
In point source pollution, the pollutants come from a ______
, easily identifiable source.

Answers

the answer would be single

Answer:

What is point source pollution?

In point source pollution, the pollutants come from a

single, easily identifiable source.

Explanation:

plato answer

Which feature is found in both cartilage and bone ?

Answers

Answer:

The features that are found in both cartilage and bone are,  living cells embedded in a matrix

Explanation:

Answer:

it would be the nose

Explanation:

what is Otis’s gene versions for body color

Answers

Answer:

giao

Explanation:

What is your opinion about minor children (under the age of 18) donating one of their kidneys for their brother or sister? Write at least three sentences stating your opinion and backing your answer.

Answers

i believe that children under the age of 18 should not be permitted to donate kidneys. it could possibly cause health issues down the line. also decisions made at a young age might not be a good idea.

a radioactive element has a half-life of 3,000 years. if a sample of this element begins with a mass of 60 grams, how long would you have to wait for the mass to decrease to 15 grams

Answers

Answer:

N = 60 g

Half life : N/2 = 3000

N/4 = 15 g

what three phases of the cell cycle are considered interphase

Answers

Answer:

The cell cycle has three phases that must occur before mitosis, or cell division, happens. These three phases are collectively known as interphase. They are G1, S, and G2. The G stands for gap and the S stands for synthesis.

Explanation:

The three phases of the cell cycle that are considered interphase include G1, S phase and G2.

The cell cycle can be divided into the interphase and mitotic (M) phases.

The interphase can in turn be divided into a Growth G1 phase, synthesis (S) phase and Growth G2 phase.

The synthesis of the genetic material (DNA) occurs in the S phase, whereas in G1 and G2 the cell synthesizes all materials required to enter into cell division.

In conclusion, the three phases of the cell cycle that are considered interphase include G1, S phase and G2.

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This type of sexual reproduction is when sperm and egg join together externally (outside of the body). *

Answers

Answer:

External Fertilization

Explanation:

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Why is a pasture-type system is
more labor intensive than
controlled systems?
A. There is greater maintenance of the
equipment.
B. There is greater need to handle diseases.
C. There is greater area to cover to observe and
manage the animals.
D. There is greater cost of feed per animal.

Answers

Answer:

The correct option is C.

There is greater area to cover to observe and

manage the animals.

Explanation:

This is because pasture type system refers to a large area of land where grasses are grown and animals are allow to graze the area of land to obtained nutrients. In this system there is large area of land where animals are well observed while feeding in order to prevent the risk of loss and attacks.

Did the seized tusk come from one of the recently slaughtered elephants? ________ What evidence supports your finding?

Answers

Complete question:

Now you are ready for your first major assignment. Your colleagues are investigating a newly seized tusk and wonder if the tusk is from a recently discovered crime where 10 elephants from the same population were found dead with their tusks removed. The genotype of the seized tusk for five short tandem repeat (STR) loci is shown in Table 1. Allele names for each of the STR loci correspond to their size in base pairs (bp). Table 2 lists the genotypes of the same five STR loci for 10 recently slaughtered elephants.

Did the seized tusk come from one of the recently slaughtered elephants? ________ What evidence supports your finding?

Note: You will find the tables in the attached files

Answer:  

Probably the seized tusk belonged to elephant number eight.

Explanation:

Potentially, the seized tusk might belong to individual number eight. In both the tusk and the elephant, the genetic analysis resulted in the same-sized alleles for each locus.

FH19: 193 193FH60: 147 147FH67:97 103FH71: 62 62FH129: 152 160

The fact that, among the ten individuals of the population, only the individual number 8 matches the tusk for SRT loci, suggests that it belongs to the animal, but it does not ensure it 100%.

What is the function body system shown below?

Answers

Answer:

provide nutrients to the body

Explanation:

this is the digestive system

How are gymnosperm seeds and angiosperm seeds different?

Answers

Answer:

angiosperms have seeds that are closed within an ovary, gymnosperms have no flowers or fruits, and have unenclosed seeds on the surface of scales or leaves

Comment on the folding of protein in vaccum​

Answers

Answer:

Protein folding is a process by which a polypeptide chain folds to become a biologically active protein in its native 3D structure. ... The amino acids in the chain eventually interact with each other to form a well-defined, folded protein. The amino acid sequence of a protein determines its 3D structure.

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