Biotechnology: Principles and Processes — BIOLOGY STD 12 Science — Question

Why are the mito tic divisions in the functional megaspore nucleus called free-nuclear divisions?

Give an example for:
An endothermic animal

Law of independent assortment was based on which observations of Mendel?

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

The accessibility of promoter region of prokaryotic DNA is often regulated by the interaction of a protein with a certain sequence of DNA. What name is given to such a DNA sequence?

Why is it not possible for an alien DNA to become part of a chromosome anywhere along its length and replicate normally?

Match Column I with Column II.

S. No.	Column I	S. No.	Column II
A.	Cleavage	1.	Outer layer of the blastocyst that attaches to the endometrium during implantation.
B.	Implantation	2.	Mitotic divisions of the zygote in quick succession.
C.	Inner cell mass	3.	Embedding of the blastocyst in the endometrium of uterus.
D.	Trophoblast	4.	Release of secondary oocyte from the ovary.
E.		5.	Group of cells attached to one end of trophoblast that differentiate into embryo proper.

What is the function of aminoacyl tRNA synthetase?

If three children in a family have blood groups O, AB and A, the genotypes of the parents must be _______ and ______.

Name the specific sequence of DNA in a plasmid that the 'gene of interest' ligates with, to enable it to replicate.