The number of nuclei present in a zygote is:
The nucleus of the sperm and the egg fuses together to form one nucleus with 2n number of chromosomes.
Question 23 The number of pair(s) of sex chromosomes in the zygote of humans is (a) One (b) Two (c) Three (d) Four
Question 03(iii) The number of nuclei present in a zygote is _______.
The number of pair(s) of sex chromosomes in the zygote of humans is :
(a) one (b) two (c) three (d) four
Define foetus. After how many weeks of development, a human embryo is said to become a foetus?
What is meant by 'reproduction'? Why is it essential?
Differentiate between internal fertilisation and external fertilisation. What type of fertilisation takes place in (a) frog, and (b) fox?
What is the success rate of the IVF technique of reproduction in humans?
Name two animals which undergo metamorphosis and which do not.
What is the other name of sex cells ?