Monohybrid Cross

Q. The genotypic ratio obtained when a heterozygous tall plant (Tt) is crossed with itself is:

1. TT:tt = 1:3
2. TT:Tt:tt = 1:3:4
3. TT:Tt:tt = 1:2:1
4. Tt:tt = 1:3

Q.

Find the percentage of tall plants in ${\text{F}}_1$ and ${\text{F}}_2$ generation from the image given below.

1. ${\text{F}}_1$- 50 %, ${\text{F}}_2$ – 75%

2. ${\text{F}}_1$- 100 %, ${\text{F}}_2$ – 75%

3. ${\text{F}}_1$- 100 %, ${\text{F}}_2$ – 100%

4. ${\text{F}}_1$- 100 %, ${\text{F}}_2$ – 25%

Q.

In guinea pigs, the allele for short hair(H) is dominant. If all the guinea pigs are born short haired in F1, what are the possible genotypes of the male and female parents?

1. HH and hh

2. HH and HH

3. hh and hh

4. Hh and Hh

Q. The character which is expressed in both homozygous and heterozygous condition is

1. Dominant
2. Genotype
3. Phenotype
4. Recessive