Question
A father is not colorblind and a mother is a carrier for the colorblindness allele (she is heterozygous). Is it possible for them to have a colorblind daughter? Remember, colorblindness is a recessive trait.
Responses
Yes, because females only have one X chromosome and the mother could give the colorblind allele to her while the father passes on a Y chromosome.
Yes, because females only have one X chromosome and the mother could give the colorblind allele to her while the father passes on a Y chromosome.
Yes, because the father and mother could both pass on a colorblind allele.
Yes, because the father and mother could both pass on a colorblind allele.
No, because it is not possible for the father to give an X chromosome with a colorblind allele.
No, because it is not possible for the father to give an X chromosome with a colorblind allele.
No, because the father would pass on his Y chromosome to his daughter.
No, because the father would pass on his Y chromosome to his daughter.
Responses
Yes, because females only have one X chromosome and the mother could give the colorblind allele to her while the father passes on a Y chromosome.
Yes, because females only have one X chromosome and the mother could give the colorblind allele to her while the father passes on a Y chromosome.
Yes, because the father and mother could both pass on a colorblind allele.
Yes, because the father and mother could both pass on a colorblind allele.
No, because it is not possible for the father to give an X chromosome with a colorblind allele.
No, because it is not possible for the father to give an X chromosome with a colorblind allele.
No, because the father would pass on his Y chromosome to his daughter.
No, because the father would pass on his Y chromosome to his daughter.
Answers
GPT-4o mini
To determine if it's possible for a father who is not colorblind and a mother who is a carrier of the colorblindness allele (heterozygous) to have a colorblind daughter, we first need to look at the genetics of colorblindness.
Colorblindness is a recessive trait linked to the X chromosome. The mother's genotype, being a carrier, would be X^C X^c (where X^C is the normal vision allele and X^c is the colorblindness allele). The father's genotype, being not colorblind, would be X^C Y (since males have one X and one Y chromosome).
When they have children, the possible combinations of alleles that can result from their union are as follows for daughters (who inherit one X chromosome from each parent):
- From the mother (carrier): X^C (normal vision) or X^c (colorblind)
- From the father (normal vision): X^C (the only X available, as he gives a Y to sons)
Thus, the possible combinations for daughters would be:
1. X^C from the mother and X^C from the father = X^C X^C (normal vision)
2. X^c from the mother and X^C from the father = X^C X^c (carrier, normal vision)
In neither scenario can they produce a daughter with the colorblind phenotype (X^c X^c) because the father contributes an X chromosome with the normal vision allele (X^C).
Thus, the correct response to the question is:
No, because it is not possible for the father to give an X chromosome with a colorblind allele.
Colorblindness is a recessive trait linked to the X chromosome. The mother's genotype, being a carrier, would be X^C X^c (where X^C is the normal vision allele and X^c is the colorblindness allele). The father's genotype, being not colorblind, would be X^C Y (since males have one X and one Y chromosome).
When they have children, the possible combinations of alleles that can result from their union are as follows for daughters (who inherit one X chromosome from each parent):
- From the mother (carrier): X^C (normal vision) or X^c (colorblind)
- From the father (normal vision): X^C (the only X available, as he gives a Y to sons)
Thus, the possible combinations for daughters would be:
1. X^C from the mother and X^C from the father = X^C X^C (normal vision)
2. X^c from the mother and X^C from the father = X^C X^c (carrier, normal vision)
In neither scenario can they produce a daughter with the colorblind phenotype (X^c X^c) because the father contributes an X chromosome with the normal vision allele (X^C).
Thus, the correct response to the question is:
No, because it is not possible for the father to give an X chromosome with a colorblind allele.