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pogonyaev
3 years ago
14

A yellow fever mosquito has 3 chromosomes in its eggs. how many chromosomes does it have in its wing cells

Biology
1 answer:
sesenic [268]3 years ago
7 0
<span>It have 18 chromosomes in its eggs. Because it has 6 chromosomes in each somatic cells. So 6 x 3 = 18 chromosomes. This is because the mosquito received 3 chromosomes from its mother and 3 chromosomes also from its father making up 6 chromosomes.</span>
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Answer:

11. b.

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Write out the equations:

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Fault in other options:

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6 0
3 years ago
What is the probability that the first offspring from the cross listed below will be heterozygous for all loci?
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Answer and Explanation:

<u>Cross:</u> aa Bb dd Ee x AA bb Dd Ee

We can calculate the probability of getting heterozygous individuals in the progeny by using the <u>product rule</u>. Assuming that these four genes <u>assort independently</u> (<em>events that occur independently from each other</em>), we can infer that the F1 will have the next genotypic proportions for each gene:

1) aa     x     AA

F1) 4/4=1 Aa

2) Bb    x    bb

F1) ½ bb

     ½ Bb

3) dd    x    Dd

F1) ½ dd

     ½ Dd

4) Ee    x    Ee

F1) ¼ EE

    2/4 = ½ Ee

     ¼ ee

So, to know what the probability is that the F1 of being heterozygous for all loci, we must multiply the respective individual probabilities of getting a heterozygous genotype, like this:  

1 Aa   x   ½ Bb   x    ½ Dd    x    ½ Ee = 1/8 AaBbDdEe

                                 

6 0
3 years ago
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