When Carl Correns crossed true breeding red flower plant (RR) with true breeding white flower plant, what was the genotype of F1?
a) ½ RR and ½ rr
b) ½ RR, ¼ Rr and 14 rr
c) ½ Rr, ¼ RR and ¼ rr
d) all were Rr
Explanation: all the F1 generation was heterozygous “Rr”
When pink flower of 4 O’ clock plant is crossed with one another, what will be the phenotypic ratio among offspring?
a) 1:3
b) 1:2:1
c) 9:3:3:1
d) 3:1
When Carl Correns
self-crossed heterozygous pink flower plant (Rr X Rr), what was the phenotype
of F2 generation?
a) half red half white
b) half pink, one fourth white and one fourth red
c) half white and one fourth red and one fourth pink
d) all were pink
Explanation: the ratio between red, pink and white was=1:2:1
F2 generation of a monohybrid cross yield the offspring in genotypic ratio of...
a) 1:2:1
b) 1:1
c) 9:3:3:1
d) 3:1
Explanation: 1 homozygous dominant, 2 heterozygous and 1 homozygous recessive
Phenotypic ratio of 3:1 proves……..
a) co-dominance
b) segregation
c) crossing over
d) independent assortment
Explanation: 3 dominant and 1 recessive trait
How many genotype/s will be produced by crossing of two alleles “T” and “t”?
a) one
b) two
c) three
d) four
Explanation: that is Tt genotype (a heterozygote)
