Advertisements
Advertisements
Question
Write a short note on sex determination in man.
Solution
The difference between two individuals of the same species with respect to heredity is known as sex. So, an individual can either be a male or female in normal circumstances. Scientists have discovered that sex is transmitted by definite sex determination, also called heterosomes. The human body cells have two sex- chromosomes. A woman has two X- chromosomes while a man has one X- chromosome and one Y-chromosome.
Therefore, an egg cell has one X- chromosome and a sperm cell have either an X- or a Y-chromosome. This means that the sex of a baby is determined by the type of sperm cell fertilizing the egg. If an egg, fused with a sperm having Y-chromosome, then the male zygote will develop and when fused with a sperm having an X-chromosome then a female zygote will develop.
APPEARS IN
RELATED QUESTIONS
Explain the mechanism of sex determination in birds.
How is the sex of the child determined in human beings?
Write notes on sex determination in the unborn baby.
Which of the following is an example of ZW – ZZ type of mechanism of sex determination?
Which of the two, sperm or ovum, decides the sex of the child?
The human animal which has an XY pair of chromosomes is called :
(a) male
(b) hybrid
(c) female
(d) doomed
Short Answer Question.
“Father is responsible for determination of sex of child and not the mother”. Justify.
ZW-ZZ system of sex determination occurs in
Diploid larvae which get royal jelly as food develops into ____________ and other develops into workers (sterile females).
Human offspring’s sex is determined ______
