A. Dominant lethal genes in heterozygous individuals
B. Dominant lethal genes in homozygous individuals
C. Dominant epistasis
D. None of the above
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 - If a heterozygous tall plant is crossed with a homozygous dwarf plant the proportion of dwarf progerry will be__________________?
A. 25%
B. 50%
C. 75%
D. 100% - When red tall plant is crossed with dwarf white plant all the plants of F, are found to be tall red. which of the following ratio will be available when a test cross is made_________________?
A. 3:1
B. 1:2:3
C. 1:1:1:1
D. 1:2:1 - Ratio of genotypic covariance to the phenotypic covariance is____________________?
A. Heritability (b.s)
B. Genetic gain
C. Co-heritability
D. Genetic advance - In line x tester cross each male is crossed with____________________?
A. Different sets of females
B. Few females in a set
C. Same sets of females
D. All the above - Ratio of additive variance to phenotypic variance is called___________________?
A. Heritability (broad sense)
B. Heritability (narrow sense)
C. Co-heritability
D. Genetic gain - If a pure tall plant is crossed with a pure dwarf one, the ratio of tall pure dwarf in the F 2 generation after selling F1 plant will be___________________?
A. 1:1
B. 1:2
C. 2:1
D. 3:1 - A useful process for determining whether an individual is homozygous or heterozygous is_____________________?
A. Cross breeding
B. Back crossing
C. Self fertilization
D. Inbreeding - If a plant heterozygous for tallness is selfed, f2 feneration has both tall and dwarf plants. this proves the principle of__________________?
A. Dominance
B. Segregation
C. Independent assortment
D. Incomplete dominance - If the cell of an organism (heterozygous) for two pairs of genes represented by Aa, Bb, undergoes meiosis then the possible genotype of gametes are________________?
A. AB, ab
B. Ab, ab
C. AB, Ab, aB, ab
D. Data insufficient
