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प्रश्न
Name any two genetic in humans.
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उत्तर
Colour-blindness, Thalassaemia, Sickle cell anaemia and Haemophilia
संबंधित प्रश्न
There are two sets of chromosomes in the zygote.
- E is the gene for brown eye colour and e is the gene for blue eye colour. Which gene is (i) recessive, and (ii) dominant?
- Both father and mother have the genes Ee in their cells. What colour are their eyes?
- Which combination of genes in the zygote will produce children with blue eyes?
- Which combinations of genes in the zygote will produce children with brown eyes?
The person A has only B chromosomes in all its gametes. On the other hand, another person C has chromosome D in half of gametes and chromosome E in the other half of gametes. When chromosomes B and D combine during fertilisation, a female zygote results. On the other hand, combination of B and E chromosomes produces a male zygote.
(a) What are chromosomes (i) B (ii) D, and (iii) E?
(b) Out of B, D and E, which two chromosomes are of the same type?
(c) Which chromosome is smaller in size?
(d) What is the general name of chromosomes such as B and E?
(e) Out of the two persons A and C, which one is (i) male, and (ii) female?
Name two animals which have nineteen pairs of chromosomes.
Which of the following organisms has haploid number of chromosomes?
Haplodiploidy is found in ______.
Grasshopper is an example of XO type of sex determination in which the males have ______.
In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosomes is/are ______.
- large chromosome
- small chromosome
- Y-chromosome
- X-chromosome
Human offspring’s sex is determined ______
Select the incorrect statement
