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प्रश्न
Which of the following is incorrect regarding ZW-ZZ type of sex determination?
विकल्प
It occurs in birds and some reptiles
Females are homogametic and males are heterogametic
Male produce two types of gametes
It occurs in gypsy moth
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उत्तर
Females are homogametic and males are heterogametic
संबंधित प्रश्न
Which of the following is an example of ZW – ZZ type of mechanism of sex determination?
In a human, how many chromosmes are present in a brain cell?
Define the following:
Sex-linked characters
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
The maleness of a child is determined by ______
A trait in an organism is influenced by
Structures present in a cell which is responsible for determination of the sex of a baby is ______.
Also describe as to, who determines the sex of an unborn child? Mention whether temperature has a role in sex determination.
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.
