Correct sequence of following events 1. Formation of chromosome theory of heredity 2. Experiments wh

English

Gujarati

Hindi

4.Principles of Inheritance and Variation

medium

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 $3$

Solution

It's Obvious

Standard 12

Biology

Share

Similar Questions

Choose correct answer :

$(i)$ Queen Elizabeth shows a number of haemophilic descendents.

$(ii)$ Variation in blood group prevalences due to incomplete dominance.

$(iii)$ Drosophila has three pairs of autosomal chromosomes.

$(iv)$ In birds, female is heterozygous.

medium

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.

medium

(NEET-2016)

How many sentence are correct ?

$(i)$ Every gene contains the information to express a particular trait.

$(ii)$ Gene responsible for $\beta$ – thalassemia is present on $21^{st}$ pair of autosomal chromosome.

$(iii)$ Mendel's approach of using mathematics to explain biological phenomena was totally new and unacceptable to many of the biologists of his time.

hard

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

hard

(AIIMS-2019)

Which of the following pairs is $wrongly$ matched?

medium

(NEET-2018)