Study the given pedigree chart and answer the questions:
a) Is the trait recessive or dominant?
b) Is the trait sex liked or Autosomal?
c) Give the genotypes of gen. 1 and of their III and fourth in gen II.
Dear student.
Please find the solution below.
a. The trait is recessive, as in Gen 1, no individual is affected, and in generation 2, one individual is affected.
b. The trait is autosomal.
It is not sex-linked as
If its sex-linked recessive then, in 3rd gen female child would not have got affected
If its sex-linked dominant then all would have got affected in 3rd gen.
The trait is autosomal because the trait is appearing in both males and females. If the trait would have been sex-linked than all the female daughters would have been carriers and not dominant.
c.
Regards.
Please find the solution below.
a. The trait is recessive, as in Gen 1, no individual is affected, and in generation 2, one individual is affected.
b. The trait is autosomal.
It is not sex-linked as
If its sex-linked recessive then, in 3rd gen female child would not have got affected
If its sex-linked dominant then all would have got affected in 3rd gen.
The trait is autosomal because the trait is appearing in both males and females. If the trait would have been sex-linked than all the female daughters would have been carriers and not dominant.
c.
Regards.