Type O blood group is considered the universal donor blood group. It can potentially be transfused to any patient regardless of their blood type. In emergency situation, this type of blood can be given to the patient.

Correct Option: C

Type O blood group is considered the universal donor blood group. It can potentially be transfused to any patient regardless of their blood type. In emergency situation, this type of blood can be given to the patient.

Heterosis or hybrid vigor occurs when two unrelated individuals or lines are crossed, the performance of F₁ hybrid, which is often superior to both is parents.

Correct Option: A

Heterosis or hybrid vigor occurs when two unrelated individuals or lines are crossed, the performance of F₁ hybrid, which is often superior to both is parents.

Incomplete (partial or mosaic) dominance is the phenomenon where none of the two contrasting alleles or factors is dominant. The expression of the character in a hybrid or F₁ individual is intermediate or a fine mixture of the expression of the two factors (as found in homozygous state). Incomplete or mosaic inheritance is not an example of premendelian concept of blending inheritance because the parental types reappear in the F₂ generation. It is however, considered by some workers to be an example of quantitative inheritance where only a single gene pair is involved. F₂ phenotypic ratio is 1: 2: 1, similar to genotypic ratio.

Correct Option: D

Incomplete (partial or mosaic) dominance is the phenomenon where none of the two contrasting alleles or factors is dominant. The expression of the character in a hybrid or F₁ individual is intermediate or a fine mixture of the expression of the two factors (as found in homozygous state). Incomplete or mosaic inheritance is not an example of premendelian concept of blending inheritance because the parental types reappear in the F₂ generation. It is however, considered by some workers to be an example of quantitative inheritance where only a single gene pair is involved. F₂ phenotypic ratio is 1: 2: 1, similar to genotypic ratio.

A test cross, first introduced by Gregor Mendel, is used to determine if an individual exhibiting a dominant trait is homozygous or heterozygous for that trait. It takes place between F₁ - Generation and recessive parent.

Correct Option: A

A test cross, first introduced by Gregor Mendel, is used to determine if an individual exhibiting a dominant trait is homozygous or heterozygous for that trait. It takes place between F₁ - Generation and recessive parent.

Blood group O acts as universal donor.

Correct Option: C

Blood group O acts as universal donor.