NEET BIOLOGY

GENETICS AND EVOLUTION

GENETIC BASIS OF INHERITANCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A cross between homozygous purple-flowered and homozygous white-flowered pea plants results in offspring with purple flowers. This demonstrates
A
the blending model of genetics.
B
true breeding.
C
dominance.
D
a dihybrid cross.
Explanation: 

Detailed explanation-1: -Therefore all the flowers that are produced in the F one generation are purple colored. So the correct answer for this question would be option B. That is dominance.

Detailed explanation-2: -Answer and Explanation: In this situation, every offspring produced from this cross with be a heterozygote (Pp), and because purple is dominant to white, all the offspring will be purple. Therefore, the probability of an offspring having white flowers is zero.

Detailed explanation-3: -Correct answer: Of the three purple flowers in the punnett square, two of them are heterozygous for color (Pp). The other flower is homozygous for the purple allele (PP). In addition, the white flower is homozygous for the recessive white allele (pp).

Detailed explanation-4: -Crossing a plant with white flowers and a plant that is homozygous for purple flowers results in offspring with what color combinations? All flowers will be purple. Can two plants with purple flowers produce offspring with white flowers? Yes, if both parents are heterozygous for the trait.

Detailed explanation-5: -The genotype of purple flowered pea plants is denoted as WW and that of white flowered pea plants as ww.

There is 1 question to complete.