The sex of a male child is determined by which of the following?

(1) The length of the mother's pregnancy 
(2) The length of time between ovulation and copulation
(3) The presence of an X chromosome 
(4) The presence of a Y chromosome

Darwin was most influenced by Research work of

(1) Alfred Russel Wallace
(2) Herbart Spencer
(3) Mal Thus
(4) Weismann

Phylogeny is the study of one of the following

(1) Development of an individual. 
(2) Evolution of species.
(3) Embryonic development of an organ. 
(4) Ecological adaptation of an organism.

Potato and runners of grass is an example of

(1) Homologous organs
(2) Analogous organs
(3) Vestigial organs
(4) Atavism

Mendel used a number of contrasting visible characters of garden pea. Which of the following is incorrect pair of contrasting characters ?

(1) Tall/Dwarf ­ - Height of stem
(2) Round / Wrinkled -­ Shape of seed
(3) White / Red ­ - Colour of flower
(4) Yellow / Green ­ - Colour of seed