Answer:
There must have two white genes to become white.
Explanation:
In order to a mouse to have white fur, both of their genes must be white. In the punnet square, you have a Black (BB) and a white (bb). If they have offspring, all of them have one black (Dominant) and one white (recessive). The black gene overpowers the white gene, so they come out black.
Answer:
Option A, B, and C are correct
Explanation:
Incomplete dominance means that the trait represented by two alleles expresses themselves equally thereby hindering dominance of any of the allele completely.
Now,
Let us assume the allele of red petals be represented by "R" and the allele of white petals be represented by "r"
The pink flowers will have genotype "Rr"
Now if two pink flowers are crossed, the following offsprings are produced
Rr X Rr
RR, Rr, Rr, rr
Let us evaluate all the options one by one
a) Ration of pink flower to red flower ( Rr:RR)
There are 2 pink (Rr) flower and 1 Red (RR) , thus the ration of pink flower to red flower is 2:1. Option A is correct
b) one out of four offspring is white in color, therefore the % of white flower is
%. Option B is correct
c) Two pairs RR and rr are homozygous, thus out of four offsprings two are homozygous. Therefore %of homozygous flowers will be
%. Option C is correct
d) There are two heterozygous offsprings i.e Rr, therefore the % of heterozygous is %. Option D is incorrect
e) half of the flowers are hybrid. Therefore option e is incorrect
Therefore, Option A, B, and C are correct