Reproductive Health — BIOLOGY STD 12 Science — Question

In pea hybrids between red flowered and white flowered strains were crossed back to pure red flowered strain. The progeny of this cross will have

The first genetic material could be:

Escherichia coli having plasmids for production of human insulin is cultured in medium containing __________:

By which process sperms released from the seminiferous tubules?

In humans, elephantiasis is caused by

"Two closely related species competing for the same resources can not co-exist indefinitely and the competitively inferior one will be eliminated". This is explained

The hard outer layer of pollens, named exine, is made of:

There is an irregular mating population. If the frequency of an autosomal recessive lethal gene is 0.4, then the frequency of the carriers in a population of 200 individuals is:

Mutation may results in the