CBSE Class 12-science Answered
EXPLAIN THE FOLLOWING IN DETAIL FOR 5 MARKS EACH
1 NUCLEIC ACID HYBRIDISATION
2 CRISS CROSS INHERITANCE
3 AMPLIFICATION OF DNA
4 WALKING FERNS
5 EUTROPHICATION
6 GYNAECOMASTIA
Asked by pardeepkumar2281 | 26 Sep, 2018, 09:20: PM
2. Criss cross inheritance:
- It is the transmission of a gene from mother to son or father to daughter. Those patterns of inheritance are called crisscross inheritance or skip generation inheritance, in which a character is inherited to the second generation through the carrier of first generation.
- The sex linked characters exhibit criss-cross inheritance.
- Genes on X chromosome but not on Y chromosome leads to a “criss-cross” pattern of inheritance where sons receive their X chromosome from the maternal parent and daughters receive an X from both parents.
- There are several, well-known sex-linked traits in humans: examples include hemophilia, color blindness, and the fragile X syndrome which follow criss cross pattern of inheritance.
Answered by Sheetal Kolte | 27 Sep, 2018, 12:02: PM
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