Genetics And Plant Breeding - Study Mode

[#691] An individual with 2n-1-1 chromosome constitution is called
Correct Answer

(B) Double monosomic

Explanation

Solution: An individual with a 2n-1-1 chromosome constitution is called Double monosomic. A double monosomic is missing one chromosome from each of two pairs of homologous chromosomes (designated 2N-1-1), and a double tetrasomic contains an extra pair of two pairs of homologous chromosomes (2N+2+2).

[#692] Dr. C. R. Rao is a famous plant breeder working on
Correct Answer

(D) Sorghum

Explanation

Solution: Dr. C. R. Rao is a famous plant breeder working on Sorghum. Dr. Rao was well-known for basic and applied research in breeding and agronomy of several dryland crops, especially towards sorghum improvement, hence also earning the title of 'Father of Hybrid Sorghum' in India. Due to his efforts, sorghum hybrids CSH1 CSH5 and CSH9 became very popular and were cultivated.

[#693] In fruit crops first artificial hybridization was performed by
Correct Answer

(D) Knight

[#694] What is the 'start codon' in prokaryotic organisms?
Correct Answer

(C) AUG

Explanation

Solution: AUG is the 'start codon' in prokaryotic organisms. The codon AUG is called the START codon as it is the first codon in the transcribed mRNA that undergoes translation. AUG is the most common START codon and it codes for the amino acid methionine (Met) in eukaryotes and formyl methionine (fMet) in prokaryotes.

[#695] The number of types of gametes produced by a homozygous individual is
Correct Answer

(A) 1

Explanation

Solution: The number of types of gametes produced by a homozygous individual is 1. The presence of two identical alleles at a particular gene locus. A homozygous genotype may include two normal alleles or two alleles that have the same variant. Thus, only one type of gamete will be produced by a homozygous individual.