Question

Write a short note on Sex Determination from Heredity and evolution ( In about 3 to 4 paragraph)
NCERT page no. 146

WRONG ANSWERS WILL BE REPORTED​

Answer 1

Answer:

A sex determination system is the biological system that determines develop sexual Character in an organism most of the organism creat off spring using sexual reproduction have two sexes. Occasionally there are hermaphrodite in place of one or both sexes

Answer 2

Answer:

Sex determination in humans is XX-XY type. Apart from humans, XX-XY system of sex determination is found in most mammals and some insects. In humans, there are total 46 chromosomes. Out of these 46 chromosomes, 44 are autonomies and 2 are sex chromosomes. The sex chromosomes are X and Y. Both X and Y chromosomes are different in size and shapes. They also carry different sets of genes. Females have two same chromosomes (XX) whereas males have two different sex chromosomes (XY). Hence, females have 44 + XX chromosomes and males have 44 + XY chromosomes. During gamete formation, female produces only one type of gamete 22 + X. Whereas, male produces two types of gametes, namely 22 + X and 22 + Y.

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