Which of the following offspring genotypes could result from fertilization of a normal haploid sperm with an oocyte that had und
ergone 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.
1 answer:
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.
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The correct answer should be the one that shows the producer first, (->) followed by the herbivore, (->) with the carnivore last.
Producers are organisms that harvest their own 'food' using things like the sunlight and water. Examples of producers are grass and other vegetation.
The herbivore, or an organism that consumes only vegetation and/or algae, consumes the producer.
The carnivore consumes meat, or other animals such as the herbivore. It's the last.
Therefore the answer is B.
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Question 2:
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