Question

6) A long winged male crow with a head ruff mates with a short winged crow without a head ruff. All of their male offspring have long wings, half of them have a head ruff and half lack a head ruff. All of the female offspring have long wings and half have a head ruff and half do not. A) Are either of these genes sex-linked? B) What is your reasoning? C) What is the most likely genotype for each parent and type of offspring? (4 pts)

What would be a key for this problem

Long winged male crow

Head ruff

Short winged female crow

No head ruff

Is this the correct way to do this and Are either of these genes sexed linked

What is your reasoning

Genotype for parents

Long winged male crow with a head ruff = Z^LrZ^LR

Short winged female crow without a head ruff = Z^lrW

Genotype for offsprings

½ Male offspring have long wings and a head ruff = Z^LRZ^lr

½ Male offspring have long wings without a head ruff = Z^LrZ^lr

½ Female offspring have long wings and a head ruff = Z^LRW

½ Female offspring have long wings without a head ruff = Z^LrW

	ZLr	ZLR
Zlr	ZLrZlr	ZLRZlr
W	ZLrW	ZLRW

Are either of these genes sexed linked

What is your reasoning

Ask this question several times still do not understand how do you know is? Is there a way to explain it in everyday words.

10) Hunchback serves as a silencer protein for the gene encoding Ultrabithorax. A) Which of these two genes is epistatic to the other? B) How do you know? received several scientific answers that I do not understand.

Epistasis is a form of gene interaction in which one pair of genes masks or hides the phenotypic expression of another. Hunchback (hb) gene is epistatic to Ultrabithorax (Ubx) gene.

Thank you very much. I would appreciate it if you can answer both. Do not have many questions remaining to ask for the month.