Biology High School

Which sex chromosome determines the sex of a baby?
Explain your answer.​​

Answers

Answer 1

Answer:

Girls have two X chromosomes  and boys have chromosomes (XY).

Explanation:

Girls have two X chromosomes (XX), and boys have one X and one Y chromosome (XY). Whether a baby will be a boy or a girl is determined at the time of conception.

Related Questions

characteristics that scientists study to determine if a new species has been
discovered

Answers

Answer:

When ecologists travel to regions where they are not familiar with the plants and animals, they read field guides about the flora and fauna. Many of these guides have photographs, keys to species recognition, and descriptions of size, color, and general appearance.

which of the following are key elements of darwin's theory of evolution by natural selection?

Answers

Answer:

Independent assortment and crossing over contribute to diversity within a population's gene pool. These processes occur during meiosis and result in the recombination of DNA.

Explanation:

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The three pillars of Darwin's theory of evolution are genetic variety, fitness, and adaptation. Overproduction and competition are other crucial components of this process.

What Darwin's theory of evolution by natural selection?

Charles Darwin's theory of evolution is known as natural selection. Due to the limited supply of resources in nature, animals have inherited traits that aid in both survival and reproduction.

Typically, produce more offspring than their contemporaries, leading to an increase in the frequency of such traits across successive generations.

Natural populations exhibit variation, and every population has more offspring than the environment can support. The result of this Overproduction is that those people who have the highest level of environmental genetic fitness will have offspring who are better able to compete in that environment.

Therefore, Genetic variation, fitness, and adaption are all factors in Darwin's theory of evolution.Overproduction and competition are other crucial components of this process.

Learn more about natural selection here:

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The planets, comets, and meteors of the solar system are held
(in orbit by the Sun's.
fa. Gravity
16 Spring force
I. Friction
d. Tension

Answers

Answer:

Gravity

Explanation:

Gravity keeps the planets, comets and meteors in orbit around the sun. The sun is bigger and heavier than other planets etc, this causes the planets to be pulled and kept in orbit around the sun.

Hope this helps!

What is the significance of crossing over?

Answers

Answer and Explanation:

Crossing over is the switching of genetic material (DNA), which occurs in Prophase 1.

This all happens in Meiosis, which is the process of the formation of sperm and egg cells.

The paired chromosomes from each parent align so that similar DNA sequences from the paired chromosomes cross over one another.

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Crossing over is essential for the normal segregation of chromosomes during meiosis. Crossing over also accounts for genetic variation, because due to the swapping of genetic material during crossing over, the chromatids held together by the centromere are no longer identical.

Where does the process of transcription occur within the cell?

Answers

Answer:

In the eukaryotes

Explanation:

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