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A male human is heterozygous for autosomal genes A and B and is also hemizygous for hemophilic gene h. What proportion of his sperms will be abh
  1. 1/32
  2. 1/16
  3. ¼
  4. 1/8

Yogiraj , 9 Years ago
Grade 12th pass
anser 1 Answers
Beenu Mathew

Last Activity: 9 Years ago

HI,
 
brilliant question
now see
heterozygous for A AND B AND hemizygous for h
therefore is genotype would be …??? common you know it
AaBbXh Y
(hemizygous for h as in for human males can only fall on X...
hemizygous for female would be Xh X...got it?)
ok...
now form all the kinds of gametes you can get with this,,,
abXh
ABXh
abY
AbY
aBX
aBY
ABY
AbXh
but they are asking for portion of abXh..
therfore ans is 1/8
 

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