Principle of Inheritance and VariationHard
Question
In which mode of inheritance do you expect more maternal influence among the offspring?
Options
A.Autosomal
B.Cyyoplasmic
C.Y-linked
D.X-linked
Solution
The more maternal influence can be expected in the cytoplasmic inheritance (ie, the inheritance of genes contained in the cytoplasm of a call, rather than the nucleus) The reason is that the female reproductiv cell or the egg has a large amount of cytoplasm containing many such organlles which contain their own genes and can reproduce independently (eg,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 influence
A gene located in the X-chromosome 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-chromosome to the offspring of both sexes.
This is why, the cytoplasmic inheritance is also called maternal influence
A gene located in the X-chromosome 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-chromosome to the offspring of both sexes.
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