Question

Sex-linked Punnett Squares (hint: 1-5 comes directly from your lecture)

1) What would be the genotype of a man with hemophelia? ____________

2) What would be the genotype of a woman who is a carrier for hemophelia? ___________

3) What would be the genotype of a man without hemophelia? ____________

4) What would be the genotype of a woman who has hemophelia? ____________

5) What would be the genotype of a woman who has no trace of hemophelia? _________

6) A woman with hemophelia mates with a man without hemophelia. Set up the punnett square.

a. What percentage of the children will have hemophelia? _________

b. What percentage of the children are women who are carriers? _________

7) A man with hemophelia mates with a woman without hemophelia and isn’t a carrier. Complete a punnett square for this example.

a. What percentage of their offspring will be a carrier for hemophelia? ________

b. If they have any male children will they have hemophelia? ________

Answer 1

• Sex-linked Punnett Squares-

1) What would be the genotype of a man with hemophelia? _XhY___________

2) What would be the genotype of a woman who is a carrier for hemophelia? ______XhXH_____

3) What would be the genotype of a man without hemophelia? _____XHY_______

4) What would be the genotype of a woman who has hemophelia? ______XhXh______

5) What would be the genotype of a woman who has no trace of hemophelia? __XHXH_______

6) A woman with hemophelia mates with a man without hemophelia. Set up the punnett square.

XhXh   X XHY

	Xh	Xh
XH	Xh XH	Xh  XH
Y	XhY	XhY

a. What percentage of the children will have hemophelia? ___50%______

b. What percentage of children are women who are carriers? _100%________

7) A man with hemophilia mates with a woman without hemophilia and isn’t a carrier. Complete a punnett square for this example.

XhY X XHXH

	Xh	Y
XH	XhXH	XHY
XH	XhXH	XHY

a. What percentage of their offspring will be a carrier for hemophilia? ____50%___

b. If they have any male children will they have hemophilia? ____No____

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