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प्रश्न
Distinguish between heterogametic and homogametic sex determination systems.
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
"The sex of a newborn child is a matter of chance and none of the parents may be considered responsible for it". Draw a flow chart showing determination of sex of a newborn to justify this statement.
How is the sex of the child determined in human beings?
A new born child has an XY pair of chromosmes. Will it be a baby boy or a baby girl?
In a human, how many chromosmes are present in a fertilised egg?
Does genetic combination of mother play a significant role in determining the sex of a new born baby?
The two versions of a trait (character) which are brought in by the male and female gametes are situated on :
(a) copies of the same chromosome
(b) sex chromosomes
(c) two different chromosomes
(d) any chromosomes
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
________ shows haplo-diploid type of sex-determination.
Define the following:
Autosomes
Choose the correct answer :
Human sex chromosomes are __________
Choose the correct answer:
A single recessive trait, able to express must be on _________
Drone of the honeybees shows haploid number of chromosomes. Illustrate.
How many ovum are formed when a diploid cell undergoes meiosis, during oogenesis?
In XO type of sex determination ______.
Which of the following combination of chromosome numbers represents the correct sex determination pattern in honey bees?
Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that
The belief that the mother is completely responsible for the sex of the child is wrong because the child
The chromosomal constitution of a human female can be written as ______
What is sex determination? Explain the mechanism of sex determination in the case of birds.
