What is sex determination? Explain its mechanism in human beings.
Answers
always a male is responsible for offspring gender but in our society always a female face discrimination which is very negative aspect of our society .
male have XY chromosomes present in them
female have XX chromosomes present in them.
y remains responsible for offspring gender to be boy....
hope it will help you my dear friend plz mark it as brainliest I need it 2.
Answer:
(i) Sex determining mechanism in case of humans is XY type.
(ii) Out of 23 pairs of chromosomes present, 22 pairs are exactly same in both males and females, these are autosomes.
(iii) A pair of X-chromosomes are present in the female.
(iv) Presence of X and Y chromosomes are determinant of male characteristic.
(v) During spermatogenesis among males, two types of gametes are produced. 50% carry X-chromosome and 50% has Y-chromosome besides autosomes.
(vi) Females produce only one type of ovum with an X-chromosome.
(vii) When ovum fertilises with a sperm carrying X-chromosome the zygote develops into a female (XX) and fertilisation of ovum with Y-chromosome carrying sperm results into male offspring.
(viii) Genetic make-up of the sperm determines the sex of the child.