Genetics And Plant Breeding - Study Mode

[#366] Which among the following do not follow independent assortment?
Correct Answer

(C) Linked gene on same chromosome

Explanation

Solution: A linked gene on the same chromosome does not follow independent assortment. whenever two genes are linked because of their location on a chromosome, their alleles will not segregate independently during gamete formation. As a result, test crosses involving alleles of linked genes will yield phenotypic ratios that stray from the classic Mendelian ratios.

[#367] Germplas for short term storage is
Correct Answer

(C) Working collection

Explanation

Solution: Germplasm for short-term storage is a working collection. Germplasm conservation is the most successful method to conserve the genetic traits of endangered and commercially valuable species. Germplasm is a live information source for all the genes present in the respective plant, which can be conserved for long periods and regenerated. Short-term storage, maintained at 18 to 20ºC and 30 to 40% relative humidity, is used to hold seeds while they are dried and prepared for medium and long-term storage.

[#368] From the marriage between two heterozygotes for albinism, what is the chance that the first would be non-albino
Correct Answer

(D) 3 / 4

Explanation

Solution: From the marriage between two heterozygotes for albinism, the chance that the first would be non-albino is 3 / 4 . Albinism is the congenital absence of melanin in an animal or plant resulting in white hair, feathers, scales and skin, and pink or blue eyes. Individuals with the condition are referred to as albinos. For two heterozygote parents (Aa), 1 / 4 of all offspring would be expected to show the recessive trait of albinism. The chance of a child of these parents having normal skin color (Non-albino) is 3 / 4 .

[#369] Mitosis occurs in
Correct Answer

(A) Leaf cell

Explanation

Solution: Mitosis occurs in the Leaf cell. Cell division by mitosis gives rise to genetically identical cells in which the total number of chromosomes is maintained. Before mitosis, the DNA is duplicated and then the chromosomes are split equally into two daughter cells. Mitosis occurs in somatic cells, this means that it takes place in all types of cells that are not involved in the production of gametes. Therefore it occurs in the leaf cell.

[#370] Pusa Ratna is a new variety of
Correct Answer

(D) Mungbean

Explanation

Solution: Pusa Ratna is a new variety of Mungbean . It is Suitable for the Kharif season. The average seed yield is 12.0 q/ha Pods are synchronous in maturity and mature in 65 - 70 days. This variety is tolerant to the mungbean yellow mosaic virus.