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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
the Biological/technical term for The repeating components of each DNA strand lengthwise
Name the Following
The type of gene which is not expressed in the presence of a contrasting allele.
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 |
A family consists of two parents and their five children and the pedigree chart shown below shows the inheritance of the trait colour blindness in them.
How many daughters and how many sons have been born in the family?
Differentiate Between Haemophilia and Colour blindness.
Haemophilia is more common in males because it is a ____________.
Why are sex linked recessive characters more common in the male human beings?
Holandric genes are found only in ____________.
Identify the progeny produced if a colour blind male marries a normal vision female.
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 | ______ |
