Question
Explain sex determination in birds in short.
✓
Answer
→ In some other organisms, e.g. birds, a different mechanism of sex determination is observed.
→ In this case the total number of chromosomes is same in both males and females.
→ But two different types of gametes in terms of the sex chromosomes, are produced by females, i.e. female heterogamety.
→ In order to have a distinction with the mechanism of sex determination described earlier, the two different sex chromosomes of a female bird have been designated to be the Z and W chromosomes.
→ In these organisms, the females have one Z and one W chromosomes, whereas males have a pair of Z-chromosomes besides the autosomes.
→ In this case the total number of chromosomes is same in both males and females.
→ But two different types of gametes in terms of the sex chromosomes, are produced by females, i.e. female heterogamety.
→ In order to have a distinction with the mechanism of sex determination described earlier, the two different sex chromosomes of a female bird have been designated to be the Z and W chromosomes.
→ In these organisms, the females have one Z and one W chromosomes, whereas males have a pair of Z-chromosomes besides the autosomes.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
An orchid plant is growing on the branch of mango tree. How do you describe this interaction between the orchid and the mango tree ?
How is outcrossing different from cross breeding?
Name the type of fruit, apple is categorised under and why? Mention two other examples, which belong to the same category as apple.
Identify the type of the given ecological pyramid and give one example each of pyramid of number and pyramid of biomass in such cases.What is inbreeding depression? Why do the self-pollinated crops not show the ill effects of inbreeding depression?
How would you find genotype of a tall pea plant bearing white flowers? Explain with the help of a cross. Name the type of cross you would use.
Identify the types of flower shown in $A$ and $B.$ Which out of the two will produce an assured seed set.
→List the Goal of Human Genome Project
A heavily bleeding and bruised road accident victim was brought to a nursing home. The doctor immediately gave him an injection to protect him against a deadly disease.
- What did the doctor inject into the patient's body?
- How do you think this injection would protect the patient against the disease?
- Name the disease against which this injection was given and the kind of immunity it provides.
Do eukaryotic cells have restriction endonucleases? Justify your answer.