STD 12 - 1. sexual reproduction in flowering plants — BIOLOGY STD 12 Science — Question

A fruit fly heterozygous for sex-linked genes, is mated with normal female fruit fly. Male specific chromosome will enter egg cell in the proportion.

Diversity which is seen specifically in one species it is called what ?

Assertion : Nitrogen-fixing enzyme in legume root nodules function at low oxygen concentration.

Reason : Low oxygen concentration is provided by leghaemoglobin.

The first mammals were like.....

In Drosophila, a set of homeotic genes which control body plan at the time of organ differentiation is known as:

One of the parents of a cross has mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of F2 progenies that mutation is found in.

Amino acid sequence, in protein synthesis is decided by the sequence of

What is the meaning of infertility? 

Who was awareded the Nobel prize for artificial gene synthesis-