Heredity and Ev...

New species may be formed if
(i) DNA undergoes significant changes in germ cells.
(ii) Chromosome number changes in the gamete.
(iii) There is no change in the genetic material.
(iv) Mating does not take place.

The maleness of a child is determined by

Why acquired characters are not inherited?

A basket of vegetables contains carrot, potato, radish, and tomato. Which of them represent the correct homologous structures?

How is the sex of a newborn determined in humans?

The number of chromosomes in parents and offsprings of a particular species remains constant due to

The wings of a housefly and the wings of a pigeon are examples of: 

Mendelian factors or genes as well as chromosomes are present in_______.

Normally human offspring can be of two types with XX and .......... chromosomes.

A dwarf pea plant is treated with a hormone gibberellic acid. It was found that the plant height increases rapidly. Thus it was conformed that gibberellic acid brings about increase in the height of the plant. If this treated plant is crossed with normal dwarf pea plant, what kind of progeny would you expect?