Explain the Sex determination.

1.	Explain the Sex determination.
Answer» Sex determination: The mechanism of sex determination are following types. 1. XO type of sex determination a. A large number of insects show this type of sex determination. b. Females have a pair of X chromosomes and produce only one type of gamete(egg) c. Male have only one X chromosome and produce two types of gametes d. Sex of the offspring determine by the type of male gamete. 2. XY types of sex determination a. A number of insects and mammals including man show this type of mechanism b. Females have two X chromosomes nd produce only one type of egg c. Males have one X and one Y chromosome and produce two types of sperm. d. The sex of offspring depends on the type of male gamete.(sperm) 3. ZW type of sex determination: a. Females have ZW sex chromosomes (Female heterogamaety) b. Males have ZZ sex chromosomes c. Females produce two types of gametes d. Sex of the individual is determined by the type of ovum.

Answer»

Sex determination:

The mechanism of sex determination are following types.

1. XO type of sex determination

a. A large number of insects show this type of sex determination.

b. Females have a pair of X chromosomes and produce only one type of gamete(egg)

c. Male have only one X chromosome and produce two types of gametes

d. Sex of the offspring determine by the type of male gamete.

2. XY types of sex determination

a. A number of insects and mammals including man show this type of mechanism

b. Females have two X chromosomes nd produce only one type of egg

c. Males have one X and one Y chromosome and produce two types of sperm.

d. The sex of offspring depends on the type of male gamete.(sperm)

3. ZW type of sex determination:

a. Females have ZW sex chromosomes (Female heterogamaety)

b. Males have ZZ sex chromosomes

c. Females produce two types of gametes

d. Sex of the individual is determined by the type of ovum.

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