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Question
What is Lyonisation?
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Solution
Lyonisation is a process of inactivation of one of the X chromosomes in some females.
RELATED QUESTIONS
Which of the following combinations of sex chromosomes produce a male child : XX or XY?
In a human, how many chromosmes are present in a sperm in the testes?
The exchange of genetic material takes place in :
(a) vegetative reproduction
(b) asexual reproduction
(c) sexual reproduction
(d) budding
Choose the correct answer:
A man can transfer his sex-linked gene to his ______________
Which type of sex determination is observed in honey bee?
Which of the following organisms has haploid number of chromosomes?
Select the incorrect statement
The chromosomal constitution of a human female can be written as ______
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.
