Advertisement

In which mode of inheritance do you expect more maternal influence among the off spring?

  • Autosomal

  • Cytoplasmic

  • Y-linked

  • Y-linked


B.

Cytoplasmic

The more maternal influence can be expected in the cytoplasmic inheritance (i.e. the inheritance of genes contained in the cytoplasm of a cell, rather than the nucleus. The reason is that the female reproductive cell or the egg has a large amount of cytoplasm containing many such organelles which contain their own genes and can reproduce independently (e.g., mitochondria and chloroplast) and which are consequently incorporated into the cytoplasm of all the cells of the embryo. The male reproductive cells (sperm or pollen) consist almost solely of a nucleus. Cytoplasmic organelles are thus, not inherited from the male parent.
This is why, the cytoplasmic inheritance is also called maternal inheritance.
Genes located on Y-chromosome are called Y-genes and their inheritance is called Y-linked inheritance. This carries the paternal influences.
A gene located in the X-chromosomes is said to be X-linked and its inheritance is called X-linked inheritance. In this, a male transmits his X-chromosome only to his daughters while a female transmits one of her X-chromosomes to the offspring of both sexes.

400 Views

Advertisement

The two polynucleotide chains in DNA are

  • parallel

  • discontinuous

  • antiparallel

  • antiparallel


Which antibiotic inhibits interaction between t-RNA and m-RNA during bacterial protein synthesis?

  • Erythromycin

  • Neomycin

  • Streptomycin

  • Streptomycin


The Okazaki fragments in DNA chain growth

  • result in transcription

  • polymerize in the 3’ - to - 5’ direction and forms replication fork

  • prove semi-conservative natuire of DNA replication

  • prove semi-conservative natuire of DNA replication


A sequential expression of a set of human genes occurs when a steroid molecule binds to the

  • transfer RNA

  • messenger RNA

  • DNA sequence

  • DNA sequence


First 15 16 17 Last
Advertisement