The human species $(Homo\,sapiens)$ have genetic roots in $......$

Where are the genes located? What is the chemical nature of a gene?

What is $F_{2}$ generation?

It is a commonly held misconception that the mother's egg is responsible for determining whether the baby will be a boy or a girl. But actually,it is the father's sperm that decides this. Which of the following makes the sperm the decisive factor?

When a pure tall pea plant and a pure dwarf pea plant were crossed (hybridized),what was the result in the $F_{1}$ generation?

$(a)$ Explain,giving examples,how artificial selection has helped in the formation of newer varieties of cauliflower.
$(b)$ List the steps involved in the formation of new species.
$(c)$ How do different races of human beings belong to the same species?