HEREDITY
THE PEDIGREE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
100% purple flowers
|
|
|
100% white flowers
|
|
|
75% white flowers, 25% purple flowers
|
|
|
25% white flowers, 75% purple flowers
|
Detailed explanation-1: -The cross between PP (purple flowers) and pp (white flowers) will produce pea plant having purple flowers having genotype Pp. P would be a dominant trait and p is a recessive trait, therefore plants having Pp genotype would be of purple colored. Therefore, the correct answer is option B.
Detailed explanation-2: -Here, it has been given that purple flower color is dominant over the white flower color. Hence, the flower color of a plant that is heterozygous for this trait will be purple. Let P be the dominant allele and p be the recessive allele. i.e, 3/4 or 75% of the offsprings will have purple-colored flowers.
Detailed explanation-3: -The probability that one of their offspring will have white flowers is 1/4 .
Detailed explanation-4: -When a heterozygous purple flower (Rr) is crossed with a recessive white flower (rr), the progeny obtained are with the genotype (Rr), (Rr), (rr) and (rr). So, 50% of the progeny are with purple flowers (Rr) and 50% are with white flowers (rr).