Advertisements
Advertisements
प्रश्न
Distinguish between heterogametic and homogametic sex determination systems.
Advertisements
उत्तर
| Heterogametic Sex | Homogametic Sex |
|
1. Organisms producing two different types of gametes. |
1. Organisms producing only one type of gametes. |
|
2. Example: Human male. |
2. Example: Human female. |
संबंधित प्रश्न
In a human, how many chromosmes are present in a fertilised egg?
A zygote which has inherited an X chromosome from the father will develop into :
(a) baby boy
(b) baby girl
(c) adult
(d) either boy or girl
Give Reason:
Why X-linked recessive diseases are more common among males than females.
Write the functional activity of the following structure:
Heterosomes
What is Lyonisation?
There are five daughters and no son in a family. It is because
A trait in an organism is influenced by
Female heterogamy is shown by
In humans, males are heterogametic and females are homogametic. Explain. Are there any examples where males are homogametic and females heterogametic?
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.
