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प्रश्न
What are holandric genes?
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उत्तर
The genes present in the differential region of the Y chromosome are called Y- linked or holandric genes. The Y linked genes have no corresponding allele in X chromosome.
संबंधित प्रश्न
Differentiate between:
monohybrid and dihybrid cross (phenotypic ratio)
Explain why generally only the male child suffers from colour blindness and not the female?
Make a punnett square for finding out the proportion of different genotypes in the progeny of a genetic cross between.
red flower variety of pea (RR) with white flower variety of pea (rr)
Why do men suffer from hemophilia and colour blindness? Under what conditions do women suffer from these disorders?
Give Reason:
Hemophilia shows criss-cross inheritance.
Differentiate Between Haemophilia and Colour blindness.
Short Answer Question.
Observe the given pedigree chart and answer the following question.
Give an example of a trait in human beings which shows such a pattern of inheritance.
Father of a child is colourblind and mother is carrier for colourblindness, the probability of the child being colourblind is ____________.
Girl of normal vision whose father was colour blind marries a man of normal vision whose father was also colour blind. The sons of this marriage would be ______.
Types of sex- linked genes:
(Haemophilia, Ichthyosis, nephritis, Myopia, Hypertrichosis, Retinitis pigmentosa)
| Column 'A' | Column 'B' | |
| (1) | Completely X- linked genes | ______ |
| (2) | Completely Y- linked | ______ |
| (3) | Incompletely sex-linked genes | ______ |
