Phenotype is the appearance of one organism while genotype is the gene complement it has from its ancestors. These genes only show their effect in phenotype but environment also plays an important role in this. Hence phenotype is a result of genotype and environmental interaction.

Correct Option: C

Phenotype is the appearance of one organism while genotype is the gene complement it has from its ancestors. These genes only show their effect in phenotype but environment also plays an important role in this. Hence phenotype is a result of genotype and environmental interaction.

Test cross is the cross of an individual with an individual having recessive phenotype. It is used to determine the genotype of a plant showing the dominant phenotype, that means to determine whether the individual exhibiting dominating characters are homozygous or heterozygous.

Correct Option: A

Test cross is the cross of an individual with an individual having recessive phenotype. It is used to determine the genotype of a plant showing the dominant phenotype, that means to determine whether the individual exhibiting dominating characters are homozygous or heterozygous.

crossing of one F₁ progeny with male parent. e.g

To find the genotype of hybrid test cross is done.

Correct Option: C

crossing of one F₁ progeny with male parent. e.g

To find the genotype of hybrid test cross is done.

Linkage is the inheritance of genes of same chromosome together and capacity of these genes to retain their parental combination in subsequent generation. The strength of linkage between two genes is inversely proportional to the distance between the two. This means, two linked genes show higher frequency of recombination if the distance between them is higher and lower frequency if the distance is smaller.

Correct Option: D

Linkage is the inheritance of genes of same chromosome together and capacity of these genes to retain their parental combination in subsequent generation. The strength of linkage between two genes is inversely proportional to the distance between the two. This means, two linked genes show higher frequency of recombination if the distance between them is higher and lower frequency if the distance is smaller.

When the linked genes are situated quite close, the chances of crossing over are highly reduced. Due to this, large number of parental gametes are formed and only few recombinant gametes are formed. This results in higher number of parental types in F₂ generation as compared to recombinants.

Correct Option: C

When the linked genes are situated quite close, the chances of crossing over are highly reduced. Due to this, large number of parental gametes are formed and only few recombinant gametes are formed. This results in higher number of parental types in F₂ generation as compared to recombinants.