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प्रश्न
A woman had normal vision, but her father was colourblind. She marries a man, who is colourblind.
Find out the probability of the first child being colourblind, whether it is a boy or girl.
उत्तर
That woman is heterozygous, and carrier of that trait because her father was colourblind. She marries a colourblind man, then it might be possible that her first child will be colourblind whether a son or a daughter because mother and father both possess an inherited chromosome.
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संबंधित प्रश्न
Give scientific reasons : Colour blindness is more common in men than in women.
Briefly explain the term ‘Mutation’.
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 |
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Linkage is a permanent feature of few genes.
If a woman has an allele for an X-Linked condition i.e. haemophilia, on one of her X chromosomes then this chromosome can be inherited by ______
Study the following statements and select the correct option.
Statement I: Holandric genes are present on Y chromosome. Statement II: Holandric genes are always inherited from father to son.
Holandric genes are found only in ____________.
Which of the following is also known as Bleeder's disease?
Name any two X-Linked recessive disorders.
