Question

1. A man who has hypertrichosis and is colorblind has a child with a woman who has normal hair distribution and colorvision but whose father is colorblind.

   Can they have a girl who has normal hair distribution? _________

   Can they have a boy who has normal vision? ___________

   Can they have a girl who has hypertrichosis and is colorblind? _____________

   		No ; Yes : Yes
   		Yes ; Yes : Yes
   		No ; No ; No
   		No ; Yes ; No

Answer 1

Answer will be NO; Yes ; NO

Hypertrichosis is a X linked dominant disorder , as the male or the father is affected so all the girl child will be affected as the X gene is inherited from the father to the girl child . On the other hand mother is normal and a boy child inherit Y from his father so all boy child will be normal.

Colour blindness is a X linked recessive disorder , as the father of the women had colour blindness so definitely the women will be the carrier for the disease , as the male have only one x chromosome so 50 % boy child will be unaffected 50 % will be affected by the disorder colour blindness.

NO; Thet will not have any girl child who have normal hair distribution.

YES; 50% chance is there they will have a boy with normal vision and 50 % boy child will be colour blind.

NO; they will not have any girl child who have colour blindness , the girl child will be carrier for colour blindness and all girl child will be affected by hypertrichosis.

4.pe 3 Hotichosis nked Do mirmad trait) XY Aecta) XXX CNovmal) XX xY, XY 100% guils il be neted "ttuted and all Cuil 2. Com dli tion 2, [For colo wr Blimdnks X liked Reaiv) XXX Xey XY X XX Mothut ChTand fattun CAomal Carien Fator) Mo ex, xex, XY,XY Xx, XX', XY, X'Y Yes, 50% tue Boys id be Normal. Condibom 3, Coloun Blimdness X XY X Xxe x x, Xx, XY,XY xx Cotounklindnes NO.