Two nonallelic genes produce the new phenotype when present together but fail to do so independently then it is called:
Two nonallelic genes produce the new phenotype when present together but fail to do so independently then it is called:
The correct option is C complementary gene
The correct option is C.
Explanation of the correct option:
- Generally, complementary genes are located on different gene loci, but when they are present together it leads to the expression of a particular phenotype.
- In this case, both genes are needed for phenotypic expression.
- In Lathyrus odoratus, also called sweet pea, Bateson and Punette observed that both C and P genes that are dominant alleles are important for the pigment production in the flower.
- Instead of the 9:3:3:1 ratio, the ratio that is obtained in this dihybrid cross is 9:7.
Explanation of the incorrect options:
Option A:
Polygenes are a group of genes that generate a particular phenotype or trait when they are expressed together.
Option B:
The phenomenon in which the expression of one gene is masked, suppressed, or inhibited when one or more genes are expressed is referred to as epistasis.
Option D:
The condition in which there is a failure of recessive alleles at various gene loci to be complimentary of the heterozygote, even when dominant alleles are present at both loci is called a non-complementary gene.
Final answer: Two nonallelic genes produce the new phenotype when present together but fail to do so independently referred to as complementary genes.
complementary gene
The correct option is C.
Explanation of the correct option:
- Generally, complementary genes are located on different gene loci, but when they are present together it leads to the expression of a particular phenotype.
- In this case, both genes are needed for phenotypic expression.
- In Lathyrus odoratus, also called sweet pea, Bateson and Punette observed that both C and P genes that are dominant alleles are important for the pigment production in the flower.
- Instead of the 9:3:3:1 ratio, the ratio that is obtained in this dihybrid cross is 9:7.
Explanation of the incorrect options:
Option A:
Polygenes are a group of genes that generate a particular phenotype or trait when they are expressed together.
Option B:
The phenomenon in which the expression of one gene is masked, suppressed, or inhibited when one or more genes are expressed is referred to as epistasis.
Option D:
The condition in which there is a failure of recessive alleles at various gene loci to be complimentary of the heterozygote, even when dominant alleles are present at both loci is called a non-complementary gene.
Final answer: Two nonallelic genes produce the new phenotype when present together but fail to do so independently referred to as complementary genes.
