A. Genetic diversity
B. Genetic erosion
C. Gene sanctuaries
D. Field gene banks
Related Mcqs:
- When a wheat variety with red kernels (homozygous for two non allelic and independent dominant genes) is crossed with white kenneled wheat (homozygous for two recessive non allelic independent genes), the phenotypic ratio in the F2 generation would be________________?
A. 9:3:3:1
B. 9:7
C. 9:9:9:3:3:3:1
D. 1:4:6:4:1 - The suppression of the action of a gene or genes by a gene or genes not allelomorphic to these suppressed is known as __________________?
A. Episode
B. Co dominance
C. Epistasis
D. Dominance - Self incompatibility in which the genes express in the style is known as__________________?
A. Styler SL
B. Ovarian SL
C. Polyallelic SL
D. Diallelic SL - Self incompatibility which is controlled by two genes is found in___________________?
A. Gramineae
B. Solanaceae
C. Cruciferae
D. None of the above - The term poly genes was coined by___________________?
A. Yates (1947)
B. Hazel (1943)
C. Mather (1943)
D. Griffing (1956) - Pollen sterility which is controlled by both cytoplasmic and nuclear genes is known as___________________?
A. GMS
B. CMS
C. CGMS
D. all the above - Maize has 10 pairs of chromosomes. how many linkage groups will be present if all the genes are mapped__________________?
A. 10
B. 20
C. 40
D. 15 - When two genes are situated very close together in a chromosome_____________________?
A. The percentage of crossing over between them is very
B. Hardly any cross over are detected
C. No crossing ever can ever takes place between them
D. Only double cross over can take place between them - A rearrangement of a group of genes in a chromosome in such a way that their order in the chromosomes is reversed is known as _____________________?
A. Inversion
B. Conversion
C. Recessive gene
D. Realignment - The spread of genes from one breeding population to another by migration which may result in changes in gene frequency is called________________?
A. Gene flow
B. Genetic drift
C. Gene frequency
D. None of the above
