In a diploid organism,crossing over is responsible for what?

Select the correct statement regarding the dihybrid cross experiment.

Do you think Mendel's laws of inheritance would have been different if the characters that he chose were located on the same chromosome?

Why did Morgan choose the fruit fly for his experiments to prove the chromosomal theory of inheritance?

What map unit (Centimorgan) is adopted in the construction of genetic maps?

Morgan hybridized yellow-bodied,white-eyed females to brown-bodied,red-eyed males and intercrossed their $F_{1}$ progeny. He observed that:
$(a)$ $F_{2}$ ratio deviated significantly from the $9 : 3 : 3 : 1$ ratio.
$(b)$ Both genes did not segregate independently of each other.
$(c)$ Recombinant types are not obtained in $F_{2}$ generation.
$(d)$ Both genes segregate independently of each other.
Select the correct set of statements: