Samacheer Kalvi solutions for Botany [English] Class 12 TN Board chapter 3 - Chromosomal Basis of Inheritance [Latest edition]

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?

Match List I with List II.

Which of the following sentences are correct?

1. The offspring exhibit only parental combinations due to incomplete linkage
2. The linked genes exhibit some crossing over incomplete linkage
3. The separation of two linked genes is possible in incomplete linkage
4. Crossing over is absent in complete linkage

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

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

The point mutation sequence for transition, transition, transversion, and transversion in DNA are

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

Changing the codon AGC to AGA represents

Assertion (A): Gamma rays are generally used to induce mutation in wheat varieties.

Reason (R): Because they carry lower energy to non-ionize electrons from atom

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

Which one of the following pairs of codons are correctly matched with their function or the signal for the particular amino acid?

Removal of introns and joining of exons in a defined order during transcription is called

If one strand of DNA has the nitrogenous base sequence as ATCTS, what would be the complementary RNA strand sequence?

Removal of RNA polymerase III nucleoplasm will affect the synthesis of

DNA dependent RNA polymerase catalyzes transcription on one strand of the DNA which is called the

Which of the following correctly represents the flow of genetic information?

Initiation codon is

A eukaryotic gene contains two kinds of base sequences which of these plays an important role in protein synthesis?

Codon – anticodon interactions occur by

Which of the following RNA polymerases is responsible for the transcription of protein-coding genes in eukaryotes?

How are RNA molecules transported out of the nucleus

During translation, the codon in mRNA is actually “read” by

A complex of ribosome attached to a single strand of RNA is known as

Which of the following is the start codon

What is true about tRNA?

Which one of the following hydrolysis internal phosphodiester bonds in a polynucleotide chain?

DNA element with ability to change position is called

Spliceosomes are not found in cells of

During DNA replication Okazaki fragments are used to elongate

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

What is the name of this phenomenon?

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

Draw the cross with a suitable example.

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 type of linkage is seen?

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.

Draw the cross with the correct genotype.

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?

1. What is the name of this test cross?
2. How will you construct gene mapping from the above-given data?
3. Find out the correct order of genes.

What is the difference between missense and nonsense mutation?

A B B C C D E F G H I

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

Write the salient features of the Sutton and Boveri concept.

Explain the mechanism of crossing over.

Write the steps involved in the molecular mechanism of DNA recombination with a diagram.

How is Nicotiana exhibit self-incompatibility? Explain its mechanism.

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.

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

What is DNA repair?