Genetics And Plant Breeding - Study Mode

[#606] A F 1 plant with the genetic constitution AaBbccDd is test crossed with aabbccdd, there will be.
Correct Answer

(B) 8 genotypes

Explanation

Solution: A F 1 plant with the genetic constitution AaBbccDd is test crossed with aabbccdd, there will be 8 genotypes.

[#607] Breeder seed is the progeny of
Correct Answer

(C) Nucleus seed

Explanation

Solution: The breeder seed is the progeny of the Nucleus seed. Breeder seed is produced from nucleus seed under the supervision of a qualified plant breeder in a research institute of Agricultural University. This provides for an initial and recurring increase of foundation seed. This is a hundred percent physical and genetic pure seed for the production of foundation seed. A golden yellow colour certificate is issued for this category of seed by the producing breeder.

[#608] 2n-1 is
Correct Answer

(A) Monosomic

Explanation

Solution: 2n-1 is Monosomic. Monosomy refers to the condition in which only one chromosome from a pair is present in cells rather than the two copies usually found in diploid cells. It is a term to describe the absence of one member of a chromosome pair, resulting in a clone with 45 chromosomes in the case of a single monosomy.

[#609] At which temperature range is cryapreservation done
Correct Answer

(A) -150°C to -196°C

Explanation

Solution: Cryopreservation is done at -150°C to -196°C range Cryopreservation is a process that preserves organelles, cells, tissues, or any other biological constructs by cooling the samples to very low temperatures typically -80°C or -112°F using solid carbon dioxide or -196°C (-321°F) using liquid nitrogen. The responses of living cells to ice formation are of theoretical interest and practical relevance.
At low enough temperatures, any enzymatic or chemical activity which might cause damage to the biological material in question is effectively stopped.

[#610] Transcription means transfer of Genetic information from
Correct Answer

(A) DNA to RNA

Explanation

Solution: Transcription means the transfer of Genetic information from DNA to RNA. Transcription is the process of copying a segment of DNA into RNA. The segments of DNA transcribed into RNA molecules that can encode proteins are said to produce messenger RNA (mRNA). During transcription, a strand of mRNA is made that is complementary to a strand of DNA.