What is the correct sequence of the following events

$1.$Formation of the chromosome theory of heredity

$2.$Experiments which proved that $DNA$ is the hereditary material

$3.$Mendel's laws of inheritance-discovery

Code :

  • A

    $1, 3$ and $2$

  • B

    $1, 2$ and $3$

  • C

    $3, 1$ and $2$

  • D

    $2, 1$ and $3$

Similar Questions

Match the terms in column $I$ with their description in column $II$ and choose the correct option.

Column $-I$ Column $-II$
$(A)$ Dominance $(i)$ Many genesgovern a single character
$(B)$ Codominance $(ii)$ In a heterozygousorganism only one allele expresses itself
$(C)$ Pleiotropy $(iii)$ In a heterozygousorganism both alleles express themselves fully
$(D)$ Polygenic $(iv)$ A single gene inheritanceinfluences many characters

  • [NEET 2016]

Match the Column - $I$ with $II$

Column - $I$ Column - $II$
$(a)$ Pleiotropic gene $(i)$ Both allele express equally
$(b)$ Co-dominance $(ii)$ Change in nucleotide
$(c)$ Epistasis $(iii)$ One gene shows multiple phenotypic expression
$(d)$ Mutation $(iv)$ Rust disease

  • [AIIMS 2019]

Match the following columns.

Column $- I$ Column $- II$
$(w)$ Blood group $(a)$ Polygenic inheritance
$(x)$ Skin colour $(b)$ Aneuploidy
$(y)$ Mendelian disorder $(c)$ Incomplete dominance
$(z)$ Chromosomal disorder $(d)$ Sickle-cell anaemia
  $(e)$ Co-dominance

Pick out the correct statements.

$(1)$ Haemophilia is a sex­linked recessive disease.

$(2)$ Down’s syndrome is due to aneuploidy.

$(3)$ Phenylketonuria is an autosomal recessive gene disorder.

$(4)$ Sickle cell anaemia is an $X$-­linked recessive gene disorder.

  • [NEET 2016]

A man can inherit his $X-$chromosome from his