Lobed wings (X) in drosophila result from an X-linked allele that is recessive t

Question

Lobed wings (X) in drosophila result from an X-linked allele that is recessive to the allele for wild-type wings (X). Give the genotypes of the parents in the following crosses. Hemophilia in humans is due to an x-linked recessive gene. Both Mike and Tessa are healthy. A year after they married. Tessa gave birth to a son with hemophilia. Five years later, she gave birth to a daughter with the same disease. Mike filed for divorce, claiming he is not the father of the child. Is he justified in his claim of nonpaternity? Explain why. Sarah is colorblind in only one eye. Her husband has normal vision. Half of her sons are colorblind, but none of her daughters are. What is Sarah's genotype? Why is she colorblind in only one eye? You observe a trait in a family that only appears in males, even when females carry it. It is not on the x or y chromosomes. What type of trait is this? You observe a trait in a family that is dominant in females, but recessive in males. What type of trait is this?

Explanation / Answer

Answer:

12).

Male

Female

A

X+Y

X+XL

B

XLY

X+X+

C

X+Y

XLXL

d

XLY

X+XL

13).

Yes, the hemophilic daughter is not belongs to Mike. Because, Mike do not have hemophilic allele. Daughters will get one X chro mosome from the mother and other X chromosome from father. Dughters will be expressed the trait when both of her X chromosomes have the hemophilic allele.

Male

Female

A

X+Y

X+XL

B

XLY

X+X+

C

X+Y

XLXL

d

XLY

X+XL

Related Questions

Navigate

• Browse (All)
• Browse L
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.