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Question
Name any two genetic in humans.
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Solution
Colour-blindness, Thalassaemia, Sickle cell anaemia and Haemophilia
RELATED QUESTIONS
Write the types of sex-determination mechanisms the following crosses show. Give an example of each type.
(i) Female XX with Male XO
(ii) Female ZW with Male ZZ
How is the sex of the child determined in human beings?
Name the species used in sericulture. Name the stages in the life cycle of a silk moth in cyclic form.
Which of the two, sperm or ovum, decides the sex of the child?
A normal cell of human body contains 23 pairs of chromosomes. The number of chromosomes in a sex cell (sperm or ovum) of a human being is most likely to be :
(a) 46
(b) 23
(c) 21
(d) 42
What is heterogamety ? Explain the mechanism of sex determinatin in Drosophila.
Drone of the honeybees shows haploid number of chromosomes. Illustrate.
The number of pairs of sex chromosomes in the zygote of a human being is ______
Select the incorrect statement
Given below are two statements:
Statement - I: The male Drosophila has a pair of homomorphic sex chromosomes.
Statement - II: The male human being has a pair of heteromorphic sex chromosomes.
In the light of above statements, Choose the most appropriate answer from the options given below:
