Question

Genetics: Use the information gathered in the X‑Linked Inheritance animation to answer the question.

In the animation, the rare white‑eyed males generated from offspring of true‑breeding red‑eyed females and white‑eyed males were the result of a nondisjunction of X chromosomes in the female during meiosis I.

Could white‑eyed males be generated in this cross by a nondisjunction of X chromatids in the female during meiosis II? Why or why not?

A. No, if a nondisjunction of X chromatids occurred in meiosis II of a female, none of the resulting offspring would be viable.

B. Yes, because a nondisjunction of X chromatids in meiosis II of a female will result in both white-eyed males and white-eyed females.

C. No, if a nondisjunction of X chromatids occurred in meiosis II of a female, only white-eyed females could be generated.

D. Yes, because a nondisjunction of X chromatids in meiosis II of a female will generate two abnormal gametes, one with two X chromosomes and one with no X chromosome.

E. No, if a nondisjunction of X chromatids occurred in meiosis II of a female, all progeny would have red eyes.

Answer 1

Option 'D' is correct. - D', Yes, because a non- disjunction of X - _ chromatids in meiosis of a female coill generate two cubnormal qomeles, one coill Senercele two x chromosomes and one coith no X- chromosomes Metaphase - II Ancyphase-II CNon-disjunction) Telophase II NO 'X! NO 'X!

Now, we have Femde gomeles, XRxR & o. Null (with No a due to non-disjunchion) female crossed with cohita When such eye - male, P:- XPXR AWY - o (Red eye) (white eye)

P: XR X X Nondisjunchon in meiosis-Itakes place Calarar av Jeroni ei alone V paul pool on o lla Gametes o XRyRo y alesterol sofonow Nullo bro albex Y SE posib anda tangan risaunadh ebook roof to sea XR YR XXX x*x*Y Dead Red Female rin two C Null Oxh OY andere L White male it Deadlas bocor an The cross produces; pod = Red females X X Y OXW = White Males in 1:1 Ratio.