Assume that Vulcan ears are inherited as an autosomal recessive trait with 70% penetrance. Two people...
Assume that Vulcan ears are inherited as an autosomal recessive trait with 70% penetrance. Two people heterozygous for Vulcan ears mate.
a) What is the probability that their first child will have long fingers?
b) Some people with the Vulcan ear phenotype have very tall, pointy ears whereas others have only a slight bump on the top of their ears. What is the name for variability of this phenotype?
Homework Answers
As the question tells about, vulcan ears, the phenotypic trait to be expressed in case of recessive homozygous will be long earsinstead of long fingers.
Hence the answer for part (a) of the question is described in the figure below as a step-wise manner.
(b) Some people with the
Vulcan ear phenotype have very tall, pointy ears whereas others
have only a slight bump on the top of their ears. The variability
within this phenotype is termed as 'PLEIOTROPY'. Because pleiotropy
occurs when one gene influences more than one phenotype.
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