A pea with white flowers was crossed to another pea which is also flower plant. When selfed the F2 generation produced purple and white in the ratio 9:7. The reason for the results is that :
A pea with white flowers was crossed to another pea which is also flower plant. When selfed the F2 generation produced purple and white in the ratio 9:7. The reason for the results is that :
The correct option is C It is a complementary factor
The correct option is C:
Explanation of the correct option:
- In some organisms, two genes present at separate loci interact with each other and produce a new phenotype, when present alone they produce their own phenotypes.
- These types of genes are called complementary genes.
- A pea plant with white flowers was crossed with another pea plant also with white flowers.
- The F1 plants are self-pollinated and in the F2 generation 9 plants with purple flowers and 7 plants with white flowers are produced.
- The reason in the plants with purple flowers is that both genes are complementary to each other so purple flowers are formed, in the remaining 7 plants there is no complementarity between genes so white flowers are formed.
Explanation of the incorrect options:
Option A:
The monohybrid mendelian ratio is 3:1.
Option B:
Purple flower genes are complementary to each other but the gene for the purple color flower is not dominant over the gene for the white color flower.
Final answer: A pea with white flowers was crossed to another pea which is also flower plant. When selfed the F2 generation produced purple and white in the ratio 9:7. The reason for the results is that it is a complementary factor.
It is a complementary factor
The correct option is C:
Explanation of the correct option:
- In some organisms, two genes present at separate loci interact with each other and produce a new phenotype, when present alone they produce their own phenotypes.
- These types of genes are called complementary genes.
- A pea plant with white flowers was crossed with another pea plant also with white flowers.
- The F1 plants are self-pollinated and in the F2 generation 9 plants with purple flowers and 7 plants with white flowers are produced.
- The reason in the plants with purple flowers is that both genes are complementary to each other so purple flowers are formed, in the remaining 7 plants there is no complementarity between genes so white flowers are formed.
Explanation of the incorrect options:
Option A:
The monohybrid mendelian ratio is 3:1.
Option B:
Purple flower genes are complementary to each other but the gene for the purple color flower is not dominant over the gene for the white color flower.
Final answer: A pea with white flowers was crossed to another pea which is also flower plant. When selfed the F2 generation produced purple and white in the ratio 9:7. The reason for the results is that it is a complementary factor.
