Write one feature of the gene responsible for colour blindness.
WBBSE
Class X
Life Science
03 (b) Some Common Genetic Diseases
01 Mark
2023
The gene responsible for colour blindness is X-linked recessive.
Explanation:
Colour blindness is caused by a recessive gene located on the X chromosome. Since males have only one X chromosome, they are more commonly affected by this disease. Females are carriers unless they have the defective gene on both X chromosomes.
Related Questions
More WBBSE Moderate level questions
1/12
Q.
Judge with the reason the probability of what percentage of the children born to a...
A.
The probability of a child being colour-blind if the father is colour-blind...
Q.
What is the importance of genetic counselling in arranging a marriage?
A.
Genetic counselling provides information and advice about the risk of genetic disorders...
Q.
Genetic Counselling helps to ascertain the presence of ____ gene of Thalassaemia disease.
A.
Genetic Counselling helps to ascertain the presence of beta-globin gene of Thalassaemia...
Q.
If a female, looking apparently normal but being carrier of haemophilia, marries a normal male...
A.
(d) 50% haemophilic son, and 50% apparently normal but carrier daughter. Explanation:...
Q.
Decide which of the following diseases can be prevented by taking suggestions from pre-marital genetic...
A.
(c) Thalassaemia Explanation Thalassaemia is a genetic blood disorder that can be...
Q.
What might be the genotype of the mother carrying the gene for colour blindness?
A.
XCXc Explanation: Colour blindness is an X-linked recessive trait; a carrier woman...
Q.
Match the words in column-A with the most appropriate words in column B and re-write...
A.
Column-A Column-B 1. Diabetes insipidus (d) Hyposecretion of ADH 2. Schwann cell...
Q.
What is the similarity between the two genes responsible for colour blindness and haemophilia?
A.
Both genes are sex-linked recessive genes located on the X chromosome. Explanation:...
Q.
Black-smooth hair is produced in F₂ generation resulting from a cross between pure black-rough haired...
A.
Genetic counselling detects carrier status in parents for autosomal recessive diseases like...
Q.
Mention the dominant and recessive traits of two characters related with seed and one character...
A.
Here are two seed-related characters commonly used in Mendel’s experiments, showing their...
Q.
If an apparently normal female marries a normal male and if two sons are born...
A.
Haemophilia is an X‑linked recessive disease; an “apparently normal” mother may be...
Q.
Matching (any five) 1×5=5 Column–A 2.13. ADH 2.14. Amitosis 2.15. Thalassaemia 2.16. Analogous organ 2.17....
A.
2.13 – (e) 2.14 – (d) 2.15 – (g) 2.16 – (b)...