Which of the following offspring genotypes could result from fertilization of a normal haploid sperm with an oocyte that had undergone nondisjunction in meiosis i1? (because a nondisjunction event in meiosis ii could involve the chromosome containing gene a or the chromosome containing gene a, be sure fo consider both possibilities in your final answer ) select all that apply.

Question is incomplete I have added picture of full question as attached.

Answer with Explanation:

In meiosis 1, chromosome having gene A and its homologous part having same gene would have separated. While, in meiosis 2, separation of sister chromatids take place. If there is any non-dis-junction happens will results in migration of sister chromatid into same daughter cell.

If this happens there will be two possibilities.

Firstly, production of gametes having two copies of gene A or No copy due to non-dis-junction. while in normal cell each daughter cell will have one copy of gene a in it.

Secondly, same process happens with gene a in non-dis-junction. while normally each cell have only one copy of gene a.

By considering this fact there are following offspring genotypes will be produced.

AAa

aaa

Aa

aa

oa.

the answer to your question is b

bc blah

explanation:

bc blah