Answer to Question #150807 in Genetics for Kyla Aleck Maddela

Question

Ectrodactyly, also known as lobster claw syndrome, is a recessive disorder in humans. Is a phenotypically unaffected couple produces an affected offspring, what are the following probabilities?

a. Both parents are heterozygous

b. An offspring is a heterozygote

c. The next 3 offspring will be phenotypically unaffected

d. Any 2 out of the next 3 offspring will be phenotypically unaffected

Answer 1

Since ectrodactyly is a recessive trait in human, the probabilities would be distributed as follows;

(a) 1

(b) 1/2

(c) 3/4

(d) 1/2