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

Accurate mapping of genes can be done by three point test cross because increases _____.

Due to incomplete linkage in maize, the ratio of parental and recombinants are ______.

How many map units separate two alleles A and B if the recombination frequency is 0.09?

Which is not a feature of the chromosomal theory of inheritance?

The following sequence represents the location of genes in a chromosome. A - B - C - M - R - S - y -Z. Which of the gene pairs will have least chance of getting inherited together?

Which of the following statement(s) is/are wrong with respect to Recombination process?
(i) Mitotic crossing over occurs rarely in somatic cells.
(ii) Syndesis refers to pairing of non-homologous chromosome.
(iii) Procentric synapsis starts from telomeres.
(iv) A Bivalent has four chromatids.

Mutation theory was proposed by____________

Transition type of gene mutation is caused when__________

Sharbati Sonara is a mutant wheat variety which is developed by irradiating the seeds with _________

Statement 1: Euploidy involves entire sets of chromosomes
Statement 2: Aneuploidy involves individual chromosomes within a diploid net.

Statement 1: In transversion mutation, single purine is changed to pyrimidine.
Statement 2: In transition mutation, a purine replaced by another purine.

_____ is called as "Father of Indian Green Revolution".

Assertion (A): Self-sterility is observed in Nicotiana species.
Reason (R): Because the genes are located on chromosome.

Observe the gene sequence and identify the types of aberration ABC BCD E F?

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.
i) What type of linkage is seen?
ii) Draw the cross with correct genotype.
iii) What is the possible genotype in F₂ generation?

i) What is the name of this test cross?
ii) How will you construct gene mapping from the above given data?
iii) Find out the correct order of genes.

Define linkage. Mention its types.

What are linked genes?

What are bivalents? When does this condition is noticed in a cell?

Define terminalization.

What is genetic mapping?

Name any four chemical mutagens.

What is ploidy?

Given below are the gene sequences on the chromosome. Compare them with the normal chromosome and identify the type of structural chromosomal aberrations.
Normal Chromosome : A - B - C - D - E- F - G - H - I.
Chromosome 1 : A - B - C - B .C - D - E - F - G - H - I.
Chromosome 2 : A - B - C - D - F - G - H - I

Write the salient features of Sutton and Boveri concept.

Explain the mechanism of crossing over.

State Coupling and Repulsion theory.

How crossing over differs from linkage?

What is recombination? Which is the widely accepted model of DNA recombination ?

Enumerate the uses of Genetic mapping.

Differentiate Missense mutation from Nonsense mutation.

Name the following chromosomal conditions.
(a) 2n + 2 + 2
(b) 2n - 1 - 1
(c) x
(d) 2n
(e) 2n + n + n
f) 2n + 1

Given below is a sequence of alphabets representing the genes of chromosome. Observe it and answer the questions.
A- B - C - D - E - F - G - H - I - J -K.
(a) Write the sequence of genes after the chromosome undergoes terminal deletion of single gene.
(b) What will be the gene sequence, if the genes Eand Fundergoes tandem duplication?
(c) Consider the centromere is located between the genes F and G and write a gene sequence, after paracentric inversion occurs in between the genes C, D and E.

In Drosophila melanogaster, there are four pairs of chromosomes. If there occurs chromosomal aberrations resulting in trisomic and monnsomlc condition, what will be the chromosomal count? Write the correct chromosomal count against respective chromosomal aberration.

How sex is determined in monoecious plants. write their genes involved in it.

What is gene mapping? Write its uses

Draw the diagram of different types of aneuploidy.

Why crossing over is important?

Draw a flow chart depicting the various types of ploidy.

List out the significance of ploidy.

What is translocation? Write about its types.