Asexual and Sexual Reproduction in Plants — BIO BOTANY STD 12 — Question

What is Heterosis?

What is intergenic gene interactions? Give example

Name the category of organisms that occupy the first tropic level (T1) and fourth tropic level (T4) in an ecosystem.

What is Niche?

Name the four whorls of a typical flower.

Name any four green house gases.

Define social forestry.

Given below is a sequence of alphabets representing the genes of the chromosome. Observe it and answer the questions.
A-B-C-D-E-F-G-H-I-J-K.
(a) Write the sequence of genes after the chromosome undergoes terminal deletion of a single gene.
(b) What will be the gene sequence, if the genes E and F undergo tandem duplication?
(c) Consider the centromere is located between the genes F and G and write a gene sequence after paracentric inversion occurs in between the genes C, D, and E.

Golden rice is a bio-fortified rice developed by rDNA technology. It differes from its parental strain by possessing ‘psy’ gene, ‘crt-1’ gene and ‘lye’ gene which are responsible for beta – carotene synthesis.
(a) Name the sources of the above mentioned genes.
(b) Which disease can be controlled / prevented if a person’s diet has golden rice?

What are the major post fertilization events in a flower?