BIOLOGY MIDDLE SCHOOL

How many genes are required todetermine a polygenic trait?
A. one
B. two or more
C. several thousand

Answers

Answer 1
Answer:

Two or more genes are required to determine a polygenic trait. Thus, option B is correct.

How Human sex gets decided?

Human sex gets decided by the function of SRY gene which possessed by with or without of Y chromosome. The hormone of anti-mullerian and testosterone produced from cells when activating the SRY gene. It generally confirms the development of single-male reproductive systems.

The scenario in humans, the sex ration gets affected by the male parent's hormone level. Also, in XY sex evaluation system, the sperm of male takes part in X or Y chromosome whereas the ovum from female contributes to X chromosome. This greatly results in offspring - either male (XX) or female (XY).

She creates the Punnett square cross below to show sex inheritance. She come to know that both parent determines the sex of a baby and it is when you put xx and xy on a punnet square there are equal amounts male and female.

Therefore, Two or more genes are required to determine a polygenic trait. Thus, option B is correct.

Learn more about Punnett square on:

brainly.com/question/25608427

#SPJ2
Answer 2
Answer:

Answer:

B

Explanation:

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Answers

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Answers

Hi there,
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Answers

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Answers

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