Principle of Inheritance and VariationHard
Question
A male human is heterozygous for autosomal genrs A and B and is also hemizygous for haemophilic gene h. What proportion of his sperms will be abh ?
Options
A.1/8
B.1/32
C.1/16
D.1/4
Solution
1/4The genotype of human male in question must be Aa Bb XhY.
Hence 2 × 2 × 2 = 8 types of gametes would be formed. AB Xh, ABY, aB Xh.
aBY, AbXh, AbY, abXh, abY
Hence, 1/8 proportion of his sperms would be abh.
Hence 2 × 2 × 2 = 8 types of gametes would be formed. AB Xh, ABY, aB Xh.
aBY, AbXh, AbY, abXh, abY
Hence, 1/8 proportion of his sperms would be abh.
Create a free account to view solution
View Solution FreeTopic: Principle of Inheritance and Variation·Practice all Principle of Inheritance and Variation questions
More Principle of Inheritance and Variation Questions
Which of the following most appropriately describes hemophilia?...The genes for same trait present on non-homologous chromosomes are...If a cross is made between two individuals each having genotype Bb, two offspring are obtained. out of these one has dom...Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentatio...Down′s syndrome and Turner′s syndrome are due to respectively...