Question
Describe sex-determination in birds with example.
✓
Answer
Sex chromosomes in birds are determined as Z and W. The male is homomorphic (ZZ) and the female is heteromorphic (ZW). The W-chromosome carries female sex-determining genes, and the duplication of Z-chromosomes indicates the male sex.
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
Identify a, b, c, d, e and f in the table given below:
| S. No. | Organism | Bioactive molecule | Use |
| A. | Monascus purpureus (yeast) | a | b |
| B. | c | d | antibiotic |
| C. | e | Cyclosporin A | f |
What is meant by the term ‘hot spots’ in biodiversity? List two criteria used for determining a ‘hot spot’. Name two hot spots of India.
What is cleavage?
Mention three physical properties and three chemical properties of soil, that determine the type of vegetation in a given region.
"Prevention is better than cure' is an apt slogan to safeguard adolescents from drug abuse. List any six steps that could be taken in this regard.
Name and explain the techniques used in the separation and isolation of DNA fragments to be used in recombinant DNA technology.
Answer the following questions:
Name the organic material exine of the pollen grain is made up of. How is this material advantageous to pollen grain?
Name the organic material exine of the pollen grain is made up of. How is this material advantageous to pollen grain?
Given below is the representation of amino acid composition of the relevant translated portion of b–chain of haemoglobin, related to the shape of human red blood cells.
Differentiate between the following:
mRNA and tRNA.
What is ADA deficiency and how can it be cured?