A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as:
A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as:
The correct option is C TtWW
The correct option is C
Explanation of the correct option:
- Tall pea plants with violet blooms were crossed with short pea plants with white blossoms in the experiment.
- This is a dihybrid cross in which two sets of traits, namely plant length, and bloom color, are investigated.
- When two or more pairs of characters are analyzed, Mendel's Principle of Independent Assortment indicates that one pair of characters is fully independent of another pair of characters.
- As a result, the two traits, plant length, and blossom color will assort separately.
- According to Mendel's Law of Dominance, the dominant trait is the one that occurs in the F1 generation, while the recessive trait is the one that does not.
- All of the progeny produced violet blooms in this location. This indicates that the violet flower color has the upper hand over the white blossom color.
- Because it entails breeding tall pea plants with violet flowers with a phenotypically recessive individual, the experiment described here is a testcross (short pea plants bearing white flowers).
- Because the dominant trait for flower color is present in every descendant, the parent plant is dominant homozygous for flower color (i.e. WW).
- Contrary to popular belief, nearly half of the progeny were small and the other half were tall, implying a 1: 1 ratio of tall to short plants. This test cross result indicates that the parent plant is heterozygous for plant length (I.e. Tt).
- As a result, the tall parent's genotype will be TtWW.
Explanation of the incorrect option:
Option A:
All progeny of the plant with genotype TTWW will have tall height and violet color flowers.
Option B:
All progeny of the plant with genotype TTww will have tall height and white color flowers.
Option D:
All progeny of the plant with genotype TtWw will have 50% tall height white color flower and 50% short height and violet color flower.
Final answer: A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as TtWW.
TtWW
The correct option is C
Explanation of the correct option:
- Tall pea plants with violet blooms were crossed with short pea plants with white blossoms in the experiment.
- This is a dihybrid cross in which two sets of traits, namely plant length, and bloom color, are investigated.
- When two or more pairs of characters are analyzed, Mendel's Principle of Independent Assortment indicates that one pair of characters is fully independent of another pair of characters.
- As a result, the two traits, plant length, and blossom color will assort separately.
- According to Mendel's Law of Dominance, the dominant trait is the one that occurs in the F1 generation, while the recessive trait is the one that does not.
- All of the progeny produced violet blooms in this location. This indicates that the violet flower color has the upper hand over the white blossom color.
- Because it entails breeding tall pea plants with violet flowers with a phenotypically recessive individual, the experiment described here is a testcross (short pea plants bearing white flowers).
- Because the dominant trait for flower color is present in every descendant, the parent plant is dominant homozygous for flower color (i.e. WW).
- Contrary to popular belief, nearly half of the progeny were small and the other half were tall, implying a 1: 1 ratio of tall to short plants. This test cross result indicates that the parent plant is heterozygous for plant length (I.e. Tt).
- As a result, the tall parent's genotype will be TtWW.
Explanation of the incorrect option:
Option A:
All progeny of the plant with genotype TTWW will have tall height and violet color flowers.
Option B:
All progeny of the plant with genotype TTww will have tall height and white color flowers.
Option D:
All progeny of the plant with genotype TtWw will have 50% tall height white color flower and 50% short height and violet color flower.
Final answer: A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as TtWW.
