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प्रश्न
Give Reason:
Why X-linked recessive diseases are more common among males than females.
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उत्तर
Because females have two copies of the X-Chromosome and males have only one X- chromosome.
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संबंधित प्रश्न
If a normal human cell has 46 chromosomes, how many chromosomes will be there in a human sperm cell?
Does the sex of the child depend on the father or it is just a matter of chance? Discuss.
Define the following:
Autosomes
Kavitha gave birth to a female baby. Her family members say that she can give birth to only female babies because of her family history. Is the statement given by her family members true? Justify your answer.
How many ovum are formed when a diploid cell undergoes meiosis, during oogenesis?
In XO type of sex determination ______.
Human offspring’s sex is determined ______
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.
