Gene

Q.

What are lampbrush chromosomes?

Q. What is difference between chromosomes, DNA and genes?

Q.

Which is the largest chromosome?

Q. Cells that contain a double set of chromosomes are called cells.

1. haploid
2. diploid
3. uniploid

Q. refers to the pair of genes responsible for the visible characteristics in individuals.

Q. _____ is a short segment of DNA that codes for a character.

1. Chromatin
2. Allele
3. Chromosome
4. Gene

Q. Which is the type of allele that can express in both homozygous and heterozygous conditions?

1. Dominant
2. Recessive
3. Both
4. Genotype

Q. What type of progeny would you expect if genes are completely linked?

1. No progeny survive
2. Parental types and recombinants both
3. Parental types only
4. Only recombinanats

Q.

The diagram shows chromosomes in a nucleus.

What are Y and Z?

1. Y – Centromere, Z – Centriole

2. Y – Centromere, Z – Chromatid

3. Y – Chromatid, Z – Centriole

4. Y – Chromatid, Z – Centromere

Q.

The differences in the characters [or traits] among the individuals of a species are called genotypes.

1. True

2. False

Q. State the exact location of the following:
Centromere:

[1 Mark]

1. Always at the centre of chromosomes
2. At different positions on different types of chromosomes
3. Always between the centre and the terminal end of chromosomes
4. Always at the terminal end of chromosomes

Q.

How do you identify polygenic inheritance?

Q.

What is the position of the centromere in the telocentric chromosome?

Q. ________ chromosome has centromere near the tip.

1. Acrocentric
2. Metacentric
3. Telocentric
4. Sub-metacentric

Q. Which is the type of allele that can express in both homozygous and heterozygous conditions?

1. Dominant
2. Recessive
3. Both
4. Genotype

Q. Genes are the functional segments of DNA.

1. True
2. False

Q. Q. But DNA is the unit of Heredity?
(Genes are the units of heredity) that
characteristics of organisms.

Q. What do you mean by alleles ?

Q. _____ is a short segment of DNA that codes for a character.

1. Chromatin
2. Allele
3. Chromosome
4. Gene

Q. A/An is an alternative form of a gene. Organisms typically have alleles for a single trait.

1. one
2. allele
3. two
4. chromosome
5. DNA
6. three

Q. are mutants & mutations , as seen in the x-men movies, actually possible?

Q. How many chromatids are there in a human cell
1.Autosomes
2.Sex chromosome

Q.

What do you mean by alleles ?

Q.

Give Reason:A gene is the unit of inheritance