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प्रश्न
Choose the correct answer:
Males have more chances of suffering from sex-linked disease because of ___________
विकल्प
one Y chromosome
one X chromosome
autosomes
none of these
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उत्तर
Males have more chances of suffering from sex-linked disease because of one X chromosome
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संबंधित प्रश्न
In a human, how many chromosmes are present in a brain cell?
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?
Choose the correct answer from the four options given below :
In a human male, a sperm will contain :
Explain the following terms:
Identical twins
How many ovum are formed when a diploid cell undergoes meiosis, during oogenesis?
The number of pairs of sex chromosomes in the zygote of a human being is ______
Human offspring’s sex is determined ______
Fill the blank circles in figure and identify the sex of child A and B.
Sex of an individual is determined by different factors in various species. Some animals rely entirely on the environmental ones, while in some other animals the individuals can change their sex during their life time indicating that sex of some species is not genetically determined. However in human beings, the sex of an individual is largely determined genetically.
- In what way are the sex chromosomes 'X' and 'Y' different in size? Name the mismatched pair of sex chromosome in humans.
- Write the number of pair/pairs of sex chromosomes present in human beings. In which one of the parent (male/female) perfect pair/pairs of sex chromosome are present?
- Citing two examples, justify the statement "Sex of an individual is not always determined genetically".
OR
Draw a flow chart to show that sex is determined genetically in human beings.
Which of the following group shows ZW-ZZ type of sex determination?
