Class 12BiologyPrinciples of Inheritance and VariationMix Examples- Principles of Inheritance and Variation
EasyDistinguish between: Polygenic inheritance and Multiple allelism.
(N/A) Polygenic Inheritance: This refers to a trait that is controlled by two or more genes,often resulting in a continuous range of phenotypes. Examples include human skin color and height.
Multiple Allelism: This refers to the presence of more than two alleles for a single gene locus within a population. While an individual carries only two alleles,the population exhibits multiple variations. $A$ classic example is the $ABO$ blood grouping system in humans.
Multiple Allelism: This refers to the presence of more than two alleles for a single gene locus within a population. While an individual carries only two alleles,the population exhibits multiple variations. $A$ classic example is the $ABO$ blood grouping system in humans.
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Similar Questions
Match the columns:
Column $I$ Column $II$ $(a)$ Sickle cell anaemia $(p)$ Homogentisic acid $(b)$ Alkaptonuria $(q)$ Lack of Melanin $(c)$ Albinism $(r)$ Accumulation of Amino acid $(d)$ Phenylketonuria $(s)$ Defective haemoglobin
| Column $I$ | Column $II$ |
| $(a)$ Sickle cell anaemia | $(p)$ Homogentisic acid |
| $(b)$ Alkaptonuria | $(q)$ Lack of Melanin |
| $(c)$ Albinism | $(r)$ Accumulation of Amino acid |
| $(d)$ Phenylketonuria | $(s)$ Defective haemoglobin |
Medium
View SolutionHow many sentences are correct?
$(i)$ Every gene contains the information to express a particular trait.
$(ii)$ Gene responsible for $\beta$-thalassemia is present on the $11^{th}$ pair of autosomal chromosomes.
$(iii)$ Mendel's approach of using mathematics to explain biological phenomena was totally new and unacceptable to many of the biologists of his time.
$(i)$ Every gene contains the information to express a particular trait.
$(ii)$ Gene responsible for $\beta$-thalassemia is present on the $11^{th}$ pair of autosomal chromosomes.
$(iii)$ Mendel's approach of using mathematics to explain biological phenomena was totally new and unacceptable to many of the biologists of his time.
Difficult
View SolutionMatch the following columns correctly:
Column-$I$ Column-$II$ $(a)$ $1 : 2 : 1$ $(i)$ Test cross $(b)$ $3 : 1$ $(ii)$ Law of Dominance $(c)$ $9 : 3 : 3 : 1$ $(iii)$ Incomplete Dominance $(d)$ $1 : 1 : 1 : 1$ $(iv)$ Law of Independent Assortment $(v)$ Law of Segregation
| Column-$I$ | Column-$II$ |
| $(a)$ $1 : 2 : 1$ | $(i)$ Test cross |
| $(b)$ $3 : 1$ | $(ii)$ Law of Dominance |
| $(c)$ $9 : 3 : 3 : 1$ | $(iii)$ Incomplete Dominance |
| $(d)$ $1 : 1 : 1 : 1$ | $(iv)$ Law of Independent Assortment |
| $(v)$ Law of Segregation |
Medium
View SolutionIn which one of the following combinations $(a-d)$ of the number of chromosomes is the present day hexaploid wheat correctly represented?
Combination Monosomic,Haploid,Nullisomic,Trisomic
| Combination | Monosomic,Haploid,Nullisomic,Trisomic |
Medium
View SolutionSelect the correct match.
Medium
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