Male sterlity occur due to cytoplasmic or cytoplasmic- genenic inheritance, i.e., due to DNA present in mitochondrion or chloroplast under the i.e. control of extra-nuclear gene.

Correct Option: D

Male sterlity occur due to cytoplasmic or cytoplasmic- genenic inheritance, i.e., due to DNA present in mitochondrion or chloroplast under the i.e. control of extra-nuclear gene.

According to the law of Independent Assortment, alleles of different characters located in different pairs of homologous chromosomes are independent of one another in their separation or segregation during gamete formation.

Correct Option: C

According to the law of Independent Assortment, alleles of different characters located in different pairs of homologous chromosomes are independent of one another in their separation or segregation during gamete formation.

Dihybrid condition involves simultaneous inheritance of two pairs of mendelian factors or genes.

Correct Option: D

Dihybrid condition involves simultaneous inheritance of two pairs of mendelian factors or genes.

The allele which cannot express its effect in the hybrid or in the presence of dominant allele is termed as recessive. It is denoted by small letter.

Correct Option: D

The allele which cannot express its effect in the hybrid or in the presence of dominant allele is termed as recessive. It is denoted by small letter.

Gregor Johann Mendel formulated the laws of heredity and is regarded as the father of genetics.

Correct Option: B

Gregor Johann Mendel formulated the laws of heredity and is regarded as the father of genetics.