Chapter 13.4, Problem 2SB

Summary Introduction

To review:

Whether wiggly ears are autosomal recessive or sex-linked recessive trait.

Introduction:

When the genes are present on X-chromosomes, then it is known as X-linked trait. For example, the genes for colored eyes in Drosophila are present on X-chromosome and is hence called X-linked recessive trait. When the genes are present on autosomes, that is, chromosomes other than sex chromosomes, then it is known as autosomal trait. For example, malformed hands in humans is an autosomal trait. It can be passed to an offspring from both the parents. It will become an autosomal recessive trait when an individual has both recessive genes in an allelic pair.