Qunlitative and Quantitative genetics

Mention in brief the differences between the qualitative and quantitative genetics.

Expert Solution

Differences in qualitative and quantitative genetics

Qualitative genetics	Quantitative genetics
1. It deals with the inheritance of traits of kind, viz., form, structrue, colour, etc.,	1. It deals with the inheritance of traits of degree, viz., height or length, weight, number, etc.,
2. Discrete phenotypic classes occur which display discontinuous variations.	2. A spectrum of phenotypic classes occur which contain continuous variations.
3. Each qualitative trait is governed by two or many alleles of a single gene.	3. Each quantitative trait is governed by many non-allelic genes or polygenes.
4. The phenotypic expression of a gene is not influenced by environment.	4. Environmental conditions effect the phenotypic expression of polygenes variously.
5. It concerns with individual matings and their progeny.	5. It concerns with a population of organisms consisting of all possible kinds of matings.
6. In it analysis is made by counts and ratios.	6. In it analysis is made by statistical methods.

Qualitative genetics:

It is the study which deals with inheritance of qualitative traits such as structure, colour, etc.,

Quantitative genetics:

It is the study which deals with the phenotypes which vary continuously as opposed to discretely identifiable phenotypes and gene products.

Suhasini Buddi answered 2 years ago

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