Biology College

Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's phenotype? HELP I NEED TO PASS THIS TEST


A.

Brown Hair


B.

Blonde Hair


C.

Brown and Blonde Hair


D.

Black Hair

Answers

Answer 1

Answer: His phenotype will be Bb. He will have brown hair because it is a dominant trait.

Explanation: Heterozygous indicates that there are two different genes present in a genotype (Bb instead of BB or bb).

Answer 2

Mark's phenotype will be Brown hair because he is Bb i.e. heterozygous.

What is phenotype?

The term phenotype simply refers to a trait that may be observed.

Pheno means observe.

The observable qualities or traits of an organism resulting from the interplay of genetics and environment i.e.  one or more genes physical expression.

What is heterozygous?

At a given gene locus, the existence of two distinct alleles.

One recessive gene and one dominant gene or two separate mutated alleles, can make up a heterozygous genotype.

so, the Mark's phenotype will have  brown hair because he is heterozygous  thus contain Bb and  B is responsible brown hair which is dominant over gene b which is recessive and responsible of blonde hair.

Hence, the correct answer is A.

To know more about phenotype here

https://brainly.com/question/13958213

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Hurricanes tend to disperse after making landfall because the land is much hotter than the ocean water.

Answers

Answer: False

Explanation:

For a Hurricane to keep going it needs to have hot air constantly going up and cold air coming down. When it gets to land, it loses access to the heat and moisture of the sea which is greater than on land. This forces it to weaken and to eventually dissipate.

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What is it called when scientists carefully examine a new result by someone else in this field of study

Answers

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A roller coaster containing four cars is accelerating at -15 m/s2 before it comes to an abrupt stop at the end of the ride. The mass of one car is 200 kg. How much force was exerted on the roller coaster to bring it to a stop

Answers

Answer:

F = -3000 N

Explanation:

Given that,

Mass of the car, m = 200 kg

A roller coaster containing four cars is accelerating at -15 m/s²

We need to find the force exerted on the roller coaster to bring it to a stop. Let F is the force.

F = ma

Putting all the values,

F = 200 kg × (-15 m/s²)

= -3000 N

So, the force us 3000 N and it act in opposite direction.

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Answers

Answer:

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