Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

What is translocation?

A garden pea plant produced axial white flowers. Another of the same species produced terminal violet flowers. Identify the dominant traits.

What is synaptic fatigue?

What is non–disjunction?

How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies?

Mark the odd one in give each of the following groups.
Carboniferous, Triassic, Devonian, Permian.

At what stage zygote can be introduced in the fallopian tube in Zygote Intra Fallopian Transfer (ZIFT)?

In an experiment, DNA is treated with a compound which tends to place itself amongst the stacks of nitrogenous base pairs. As a result of which the distance between two consecutive base increases, from 0.34nm to 0.44nm. Calculate the length of DNA double helix (which has 2 × 109 bp) in the presence of saturating amount of this compound.

Which marker genes are present in plasmid PBR 322?

Name the following: Type of leaves in xerophytes based on distribution of stomata.