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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
Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The theory of Inheritance of Acquired Characters was proposed by Watson and Crick.
Answer the following briefly:
Explain with the help of a chart what will be the colour of a child's hair if father has got dominant gene for black hair and mother has recessive gene for brown hair?
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.

What does the child 1 indicate about this trait?
Name anyone X-linked disease found in humans.
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.
Short Answer Question.
Observe the given pedigree chart and answer the following question.

Identify whether the trait is sex-linked or autosomal.
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.
Identify the INCORRECT statement with regard to haemophilia.
What would be the progeny obtained if a haemophilic male marries a female with normal blood clotting?
Four friends P, Q, R and S were discussing the examples of genetic disorders. The examples they quoted were as follows:
P. Colour blindness and Malaria
Q. Albinism and Cholera
R. Haemophilia and Colour blindness
S. Haemophilia and Albinism
Who gave the correct examples?
