Biology
Answer
Gametes must be produced by meiosis so that the number of chromosomes in them is halved (n). It is so because when two such gametes fuse to form a zygote the original number of chromosomes is restored (2n). If the gametes are formed by mitosis their chromosome number will remain 2n and after fusion the resulting zygote will have 4n chromosomes which is not a normal condition for a species.
Related Questions
Explain - Karyotype
Differentiate between ureter and uterus with reference to their functions.
State the function of choroid and cochlea respectively.
Study the diagram given below and answer the questions that follow:
(i) Name the cells of the pancreas that produce glucagon and insulin.
(ii) State the main function of glucagon and insulin.
(iii) What is the technical term for the cells of the pancreas that produce hormones?