Question

When the embryo resembles a female but the genetic information is not passed through DNA of the nucleus of the gamete. This is through

• A. Cytoplasmic inheritance
• B. Genetic inheritance
• C. Incomplete dominance
• D. Multiple genes

Answer 1

The correct option is A Cytoplasmic inheritance

Cytoplasmic inheritance is the transmission of genes outside the nucleus from cytoplasmic organelles such as mitochondria and chloroplasts. As we know that genes are present in nucleus and also in genomes of chloroplast and mitochondria. The nuclear genes follow the Mendelian biparental genetic inheritance but the genes present in chloroplast and mitochondria follow cytoplasmic inheritance. The female gamete contribute cytoplasm to the developing embryo. Therefore, the traits controlled by cytoplasmic factors follow maternal inheritance. A ganetic inheritance includes Mendelian inheritance where the offspring inherits a maternal and a paternal allele of a gene. Incomplete dominance means that one allele is not completely dominant over the other of the same gene and thus the heterogenous genotype shows a combination of dominant and recessive phenotypes. Traits governed by more than one gene are said to be under control of multiple genes. Hence, the correct option is A.