What is gene pool? - Biology


What is gene pool?



A gene pool is the set or collection of all the genes in a population of any particular species.

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2014-2015 (March)


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If centromere is situated in the middle of the chromosome, it is called ________.

(a) Metacentric

(b) Acrocentric

(c) Submetacentric

(d) Telocentric

If the number of chromosomes in an endosperm cell is 27, what will be the chromosome number in the definitive nucleus?

  1. 9
  2. 18
  3. 27
  4. 36

Define the term ‘genome’.

Sketch and label the structure of chromosome.

How many chromosomes do drones of honey bees possess?

Briefly mention the contribution of T.H. Morgan in genetics.

Distinguish between X andY chromosomes. (Mention any 'two' points.) 

Name the type of cell division involved in the production of sperms by honey bees.

Describe the structure of chromosomes with a suitable diagram.

Distinguish between X and Y chromosomes.

Describe the structure of sex-chromosomes. 

Choose the correct options of the following question:

Study the given monohybrid cross:

A test cross for this Fj will be:

Define the Homologous chromosomes

Give an account of artificial chromosomes in the transfer of genetic material.

Explain codominance in colour coat in cattle with checker board method.

An allohexaploidy contains

The A and B genes are 10 cm apart on a chromosome. If an AB/ab heterozygote is test crossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?

Genes G S L H are located on the same chromosome. The recombination percentage is between L and G is 15%, S and L is 50%, H and S are 20%. The correct order of genes is

If the haploid number in a cell is 18. The double monosomic and trisomic number will be

Changing the codon AGC to AGA represents

Codon – anticodon interactions occur by


From the above figure identify the type of mutation and explain it.

Write the salient features of the Sutton and Boveri concept.

When two different genes came from the same parent they tend to remain together.

Write the observed phenotypic ratio.

If you cross dominant genotype PV/PV male Drosophila with double recessive female and obtain F1 hybrid. Now you cross F1 male with double recessive female.

What is the possible genotype in the F2 generation?

Mention the name of man-made cereal. How it is formed?

Identify the scientists who proposed chromosomal theory of inheritance.

Match the column I (Type of chromosome) with column II (name of chromosome).

  Type of chromosome   Name of chromosome
i. P. Acrocentric
ii. Q. Telocentric
iii. R. Metacentric
iv. S. Sub-metacentric

Telocentric chromosome differs from acrocentric chromosome in that ____________.

Which of the following is a primary constriction?

During cell division, spindle fibres get attached to the disc shaped structures present on the centromere are known as ______.

From the following identify the INCORRECT statement/s with respect to the chromosomes.

i. Chromosomes are capable of self replication and play vital role in heredity, mutation, variation, and evolutionary development of eukaryotic species.

ii. Chromosomes are visible during cell division.

iii. Chemically eukaryotic chromosomes are made of mRNA, histone and non-histone proteins.

iv. The number of chromosomes varies within the population of a particular species.

Identify the term that represents the degree of repetition of the primary basic number of chromosomes in a cell.

From the following identify the statements that are CORRECT with respect to homologous and non-homologous region of X and Y chromosomes.

i. Non-homologous region of X chromosome is longer and contains more genes than that of non-homologous region of Y chromosome.

ii. X-linked genes are present on nonhomologous region of X-chromosome.

iii. Y-linked genes are present on homologous region of Y-chromosome.

iv. Crossing over occurs only between homologous regions of X and Y chromosomes.

At secondary constriction I, ______ becomes organized during interphase.

Chromosomal theory of inheritance was put forth by ______

A plant having the genotype AABbCC will produce ______ kinds of gametes.

Two or more independent genes present on different chromosomes which determine nearly same phenotype are called ______.

Which three scientists independently rediscovered Mendel’s work?

Chromosomal theory of inheritance was given by ______.

What would be the genotype of the parents if the offspring have the phenotypes in 1:1 proportion?

There was a mix-up at the hospital after a fire accident in the nursery division. Which of these children belong to the parents? 

During mitosis, chromosomes distribution to the daughter cell is ______.

What do you mean by locus?

Which of the following phase follows S and G2 phases of interphase?

Who postulated the 'Chromosomal theory of inheritance'?

Genes located on same locus but having different expressions are:

Discuss in detail the contributions of Morgan and Sturvant in the area of genetics.

Which of the following is sex chromosomal disorder?


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