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Explain the mechanism of Sex-determinati...

Explain the mechanism of Sex-determination in birds.

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Sex determination in birds :
(1) Sex determination in birds is by ZW-ZZ mechanism.
(2) In birds, males are homogametic while females are heterogametlc.

(3) Males produce all similar types of sperms, containing 8 autosomes and 'Z' sex chromosome.
(4) Females produce two different types of eggs, one containing 8 autosomes and Z chromosome and the other containing 8 autosomes and W chromosome.
(5) When Z bearing egg is fertilized by a sperm a male offspring is produced. If W bearing egg is fertilized then female offspring is produced.
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NAVNEET PUBLICATION - MAHARASHTRA BOARD-SHORT ANSWER QUESTIONS -II-Ch-11 (Chromosomal Basis of Inheritance)
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  2. Describe the structure of chromosomes with a suitable diagram.

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  3. Describe the structure of sex chromosomes.

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  4. A normal couple gives the birth to one haemophilic son and a normal da...

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  5. Explain the mechanism of sex determination in human being.

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  6. Explain the mechanism of sex determination in human being.

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  7. Explain the mechanism of Sex-determination in birds.

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  8. With the help of a chart, explain the method of sex determination in h...

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  9. Drone of the honeybees shows haploid number of chromosomes. Illustrate...

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  10. A carrier haemophilic female marries a normal male. What will be the p...

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  11. Identify disorders developed in the given genotypes and give two sympt...

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  12. Certain genes located on chromosome 11 and 16 were found to be faulty....

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  13. Illustrate any three genes which can be used in gene therapy.

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  14. Give any two unique features of acquired immunity.

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  15. Describe the structure of antibody.

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  16. Explain ABO blood group system in human being with a suitable chart.

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  17. Attempt any TWO of the following : Give the symtoms of typhoid fever ...

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