A researcher is considering the data from a genetic study of sleep behaviours am
ID: 98868 • Letter: A
Question
A researcher is considering the data from a genetic study of sleep behaviours among twins which one of the following statements is true about dizygotic twins?
they are the result of a split of the zygote after fertilization
they come from the joining of a single egg with a single sperm cell
they have a genetic relatedness of 1
they have a genetic relatedness of 0.5
They share all alleles at all loci
a.they are the result of a split of the zygote after fertilization
b.they come from the joining of a single egg with a single sperm cell
c.they have a genetic relatedness of 1
d.they have a genetic relatedness of 0.5
e.They share all alleles at all loci
Explanation / Answer
Answer is A.
Diazygotic twins are formed by the spilitting of single zygote in two blastomeres . Then each blastomere develops in different individual which is gentically same.
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