Class 12BiologyPrinciples of Inheritance and VariationMix Examples- Principles of Inheritance and Variation
MediumAssertion $A$: Gene is the unit of inheritance.
Reason $R$: The properties of tissues are due to the constituents of their cells.
Which option is correct for Assertion $A$ and Reason $R$?
Reason $R$: The properties of tissues are due to the constituents of their cells.
Which option is correct for Assertion $A$ and Reason $R$?
- A$A$ and $R$ are true and $R$ is the correct explanation of $A$.
- B$A$ and $R$ are true but $R$ is not the correct explanation of $A$.
- C$A$ is true and $R$ is false.
- D$A$ is false and $R$ is true.
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Similar Questions
The genetic constitution of an individual is represented by:
Medium
View SolutionMatch the terms in Column-$I$ with their descriptions in Column-$II$ and select the correct option.
Column-$I$ Column-$II$ $(A)$ Dominance $(1)$ Many genes govern a single character. $(B)$ Co-dominance $(2)$ In a heterozygous organism, only one allele expresses itself. $(C)$ Pleiotropy $(3)$ In a heterozygous organism, both alleles express themselves fully. $(D)$ Polygenic inheritance $(4)$ $A$ single gene influences many characters.
| Column-$I$ | Column-$II$ |
| $(A)$ Dominance | $(1)$ Many genes govern a single character. |
| $(B)$ Co-dominance | $(2)$ In a heterozygous organism, only one allele expresses itself. |
| $(C)$ Pleiotropy | $(3)$ In a heterozygous organism, both alleles express themselves fully. |
| $(D)$ Polygenic inheritance | $(4)$ $A$ single gene influences many characters. |
Medium
View Solution$A$ male human is heterozygous for autosomal genes $A$ and $B$ and is also hemizygous for the hemophilic gene $h$. What proportion of his sperms will be $abh$?
MediumAIPMT 2004
View SolutionPick out the correct statements.
$I.$ Haemophilia is a sex-linked recessive disease
$II.$ Down's syndrome is due to aneuploidy
$III.$ Phenylketonuria is an autosomal dominant gene disorder
$IV.$ Phenylketonuria is an autosomal recessive gene disorder
$V.$ Sickle cell anaemia is an $X$-linked recessive gene disorder
$I.$ Haemophilia is a sex-linked recessive disease
$II.$ Down's syndrome is due to aneuploidy
$III.$ Phenylketonuria is an autosomal dominant gene disorder
$IV.$ Phenylketonuria is an autosomal recessive gene disorder
$V.$ Sickle cell anaemia is an $X$-linked recessive gene disorder
Medium
View SolutionMatch the following columns:
Column-$I$ Column-$II$ $A$. Mendel $i$. Allele $B$. Bateson $ii$. Factors $C$. Johannsen $iii$. Chromosome $D$. Sutton and Boveri $iv$. Gene
| Column-$I$ | Column-$II$ |
|---|---|
| $A$. Mendel | $i$. Allele |
| $B$. Bateson | $ii$. Factors |
| $C$. Johannsen | $iii$. Chromosome |
| $D$. Sutton and Boveri | $iv$. Gene |
Medium
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