Question

The sex linked characters are those
A) Which are related to sexual physiology
B) The genes of which are present on the sex chromosomes
C) Which appear either in male or in female
D) Which are controlled by sex hormones

Answer 1

The sex linked characters are the phenotypic feature in an organism which is controlled by the genes. An individual has a pair of chromosomes which is inherited from each parent. In humans, the females have XX chromosomes and males have XY chromosomes.

Complete answer:
The human beings and mammals have two sex chromosomes, X and Y and one of them is inherited from each parent. Males contain both XY chromosomes females contain only two X (XX) chromosomes. Female contains most of the genes as compared to the male chromosomes.

A sex chromosome participates in sex determination and Sex-linked character is an organism that is controlled by the genes on the Sex chromosomes. These sex linked characters are the observable features of an organism which is carried on the sex chromosomes.For example- Haemophilia is transmitted to males through the female as it is controlled by the genes which are located on the X chromosome. The genes of which are present on the sex chromosomes'.

Hence the correct answer is option ‘B’.

Note: Most of the traits are controlled by the X genes. For example, muscular dystrophy. The diseases linked to X chromosomes are transmitted through females. The diseases like webbed toes are controlled by the Y chromosomes. Thus they are transmitted only by males.