Advertisements
Advertisements
Question
Define the following:
Sex chromosomes
Advertisements
Solution
Sex chromosomes - The chromosomes which determine the sex of an individual are called sex chromosomes.
APPEARS IN
RELATED QUESTIONS
Fill in the following blank with suitable word :
The...............chromosomes for a ............are XX whereas that for a ..............are XY.
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
The sex of a child is determined by which of the following?
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?
Give Reason:
Why X-linked recessive diseases are more common among males than females.
How is sex determined in human beings?
ZZ/ZW type of sex determination is seen in ______.
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.
In a bird population using the ZW–ZZ sex determination system, if a ZZ male mates with a ZW female, what proportion of offspring would be expected to be female?
