Home
Class 12
BIOLOGY
Assertion (A) :- An organism with lethal...

Assertion (A) :- An organism with lethal mutation may not even develop beyond the zygote stage.
Reason (R ) :- All types of gene mutations are lethal .

A

A

B

B

C

C

D

D

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • CHROMOSOMAL BASIS OF INHERITANCE

    DINESH PUBLICATION ENGLISH|Exercise Check Your Grasp|57 Videos

  • CHORDATA- PROTOCHORDATA

    DINESH PUBLICATION ENGLISH|Exercise CYG|11 Videos

  • COELENTERATA AND CTENOPHORA (OR CNIDARIA AND ACNIDARIA)

    DINESH PUBLICATION ENGLISH|Exercise CYG|10 Videos

Similar Questions

Explore conceptually related problems

Assertion : A single mutation may produce a new species . Reason : Mutation may cause major variation in genetic material and these are inheritable .

Assertion(A): All isotopes of a given element show the same type of chemical behaviour. Reason(R) The chemical properties of an atom are controlled by the number of electrons in the atom.

Assertion : - Somatic hybrid can be developed only through genetic engineering. Reason :- Apomictic seed can be produced by mutation.

Assertion :- Mutation result in changes in the genotype and the phenotype of an organism. Reason :- Mutation is a phenomenon, which result in alternation of DNA sequences.

Assertion (A) : Haemophilia is a recessive sex linked disease. Reason (R ) : Haemophilia occurs due to mutation of a structural gene on chromosome 15.

Assertion :- The development & differentiation of embryo into adult organism are the result of coordinated regulation of expression of several sets or genes. Reason : The expression of all genes are not required simultaneously during development of organism.

Assertion (A). Combustion of all organic compounds is an exothermic reaction. Reason (R). The enthalpies of all elements in their standard state are zero

Assertion : A body can be at rest even when it is under the action of may number of external forces Reason : Because vector sum of the all external forces is zero .

Assertion(A): In sponges, archaeocytes are totipotent. Reason( R): They give rise to all types of amoebocytes and are self replicating.

Assertion(A): In sponges, archaeocytes are totipotent. Reason( R): They give rise to all types of amoebocytes and are self replicating.