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प्रश्न
उत्तर
A man can never transfer a sex-linked gene directly to his son because the son inherits only the Y chromosome from his father and the sex linked diseases are present on the X chromosome.
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संबंधित प्रश्न
the Biological/technical term for An alteration in the genetic material that can be inherited.
Match the terms in column I with their explanations in column II.
| Column I (Term) | Column I (Explanation) | ||
| a | genetics | 1 | Chromosomes similar in size and shape |
| b | Autosomes | 2 | The alternative forms of a gene |
| c | Recessive gene | 3 | Study of laws of inheritance of characters |
| d | Allele | 4 | A gene that can express only when in a similar pair |
| e | Homologous chromosomes | 5 | Chromosomes other than the pair of sex chromosomes |
Differentiate between:
monohybrid and dihybrid cross (phenotypic ratio)
Give Reason:
Hemophilia shows criss-cross inheritance.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Male act as a carrier for colourblindness.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
A colourblind male cannot distinguish any colour.
Which type of progeny would be produced if a normal visioned man marries a colour-blind woman?
What would be the progeny obtained if a woman carrier for colour blindness marries a normal vision man?
What is the probability of son being colour blind is if a colour blind man marries a woman who is homozygous for normal colour vision?
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 | ______ |
