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Answer the answer can be more than one choice,im confused between 2 and 4 i4 bec

ID: 13828 • Letter: A

Question

Answer

the answer can be more than one choice,im confused between 2 and 4

i4 becuase epsistaic is a gene suppress the effect of the other

3 may be worng because both of the parents have the disease and the child has to have an x chromosome...

1 may be worng, because the if so, then both parents have to be carrier in order for some of their children to have both recessive chromosome to be normal

2 may be right because the disease may skip genertations

 


The allele causing the disease is dominant but one parent carries the recessive allele
The allele causing the disease skips generations
The allele is X-linked and didn't affect their son(s)
The allele causing the disease is epistatic

Explanation / Answer

For (1) to be correct, it would have to read that BOTH parents display the dominant mutation, but BOTH are also carriers of the recessive form of the gene (ie Mm and Mm). (2) mutations don't "skip". If the trait is dominant, and inherited, it is expressed. If the mutation is dominant and is not present from one generation to the next, there is no way for the non-present generation to pass the mutation on to subsequent generations (unless the new genetic material from their mate has the mutation present). (3) is wrong, as you stated. (4) is a possibility, epistatic mutations are possible, tho not common. Hope this has helped!