To determine:
The probability of obtaining genotype
Introduction:
Autosomal allele, it may be recessive or dominant. The alleles and their associated genes are autosomal dominant or recessive. X-linked allele mean that the gene is causing genetic disorder is located on the X chromosome in females and Y in males.
Explanation of Solution
Female have two X chromosome and male has one. So the genotype of female is
The probability of obtaining
From Aa genotype of male and female gametes, one half containing A and other half a.
Thus the probability of obtaining genotype aa in the progeny will be:
In the case of BB genotype: male genotype is BB so, single type of gametes will be produced B. In females, Bb two type of gametes will produced, one half containing B and other half b. So, probability of obtaining genotype Bb, in the progeny will be:
In the case of male cc, genotype it contain single gamete which will produce c only. and in the female Cc two type of gametes will produced half containing C and other half containing c. So, probability of obtaining genotype Cc in the progeny will be:
For sex chromosome: male contain
Hence, the probability of the genotype
Table 1: Punnet square.
ABcX | aBcX | ABcY | aBcY | |
ABCX | AABBCc | AaBBCc | AABBCc | AaBBC |
ABcX | AABBcc | AaBBcc | AABBcc | AaBBcc |
AbCX | AABbCc | AabbCc | AABbCc | AaBbC |
AbcX | AABbcc | AaBbcc | AABcc | AaBbcc |
aBCX | AaBBCc | aaBBCc | AaBBCc | aaBBCc |
aBcX | AaBBcc | aaBBcc | AaBBcc | aaBBcc |
abCX | AaBbCc | aaBbCc | AaBbCc | aaBbCc |
abcX | AaBbcc | aaBbcc | AaBbcc | aaBbcc |
ABCX | AABBCc | AaBBCc | AABBCc | AaBBCc |
ABcX | AABBcc | AaBBcc | AABBcc | AaBBcc |
AbCX | AABbCc | AabbCc | AABbCc | AaBbCc |
AbcX | AABbcc | AaBbcc | AABbcc | AaBbcc |
aBCX | AaBBCc | aaBBCc | AaBBCc | aaBBCc |
aBcX | AaBBcc | aaBBcc | AaBBcc | aaBBcc |
abCX | AaBbCc | aaBbCc | AaBbCc | aaBbCc |
abcX | AaBbcc | aaBbcc | AaBbcc | aaBbcc |
X-linked allele mean that the gene is causing genetic disorder is located on the X chromosome in females and Y in males. The genotype of female is
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