How does the number of chromosomes in germ cells compare to the number of chromosomes in normal body cells of an animal?

In human females, where does the fertilization of the ovum by the sperm take place?

Which of the following organs is included in the male reproductive system?

$(i)$ $(a)$ Write the full form of $DNA$.
$(b)$ State the role of $DNA$ in the cell nucleus.
$(c)$ What will be the after-effect if the information of the $DNA$ is changed?
$(ii)$ Explain the importance of $DNA$ copying in reproduction.

Which among the following is not the function of testes at puberty?
$(i)$ formation of germ cells
$(ii)$ secretion of testosterone
$(iii)$ development of placenta
$(iv)$ secretion of estrogen

Some plants do not produce seeds. For such plants,parts like roots,stem,and leaves are used to develop into new plants.
$(a)$ Identify the process.
$(b)$ Which type of reproduction is it—sexual or asexual? Answer with reason.
$(c)$ Give any two examples of this process.