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WorksheetsPrinciple of Inheritance - 12-07-23
Total questions: 13
Worksheet time: 7mins
Given below are two statements:
Statement I: Mendel studied seven pairs of contrasting traits in pea plants and proposed the Laws of Inheritance
Statement II: Seven characters examined by Mendel in his experiment on pea plants were seed shape and colour, flower colour, pod shape and colour, flower position and stem height
In the light of the above statements, choose the correct answer from the options given below:
Statement I is incorrect but Statement II is correct
Both Statement I and Statement II are correct
Both Statement I and Statement II are incorrect
Statement I is correct but Statement II is incorrect
Choose the incorrect one.
Husband’s blood group is AB and his wife blod group is A. If their one of the children has B blood group, it is confirmed that mother is heterozygous for A blood group.
If parents are with A and B blood group, the chance of their children to have any blood group (A, B, AB or O) is
1/4.
The blood of a child is expected to be AB is parents have AB and O blood group.
There is only one case in which there is 100% chance that the child will have same blood group as their parents have. That is blood group O.
A Punnett square is used to
determine the source of new alleles.
determine how many genes control a given trait.
predict the outcome of a genetic cross.
predict the gametes that will be produced by an organism..
The best example for pleiotropy is
skin colour
phenylketonuria
colour blindness
ABO blood group
In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following :
This experiment does not follow the Principle of Dominance.
Pink colour in F1 is due to incomplete dominance.
Ratio of F2 is 1/4 (Red) : 2/4 (Pink) : 1/4 (White)
Law of Segregation does not apply in this experiment
A : ABO blood group system is due to multiple
allelism.
B : Marriages between close relatives should be
avoided because it induces more recessive
alleles to come together.
(1) If both statements are correct
(2) If both statements are incorrect
(3) If only statement A is correct
(4) If only statement B is correct
A : When 2 hybrids rrTt & Rrtt are crossed, phenotypic
ratio of offspring shall be 1 : 1 : 1 : 1.
B : Mendel’s last law is independent assortment.
(1) If both statements are correct
(2) If both statements are incorrect
(3) If only statement A is correct
(4) If only statement B is correct
A : The contrasting pairs of factors in Mendelian
crosses are called Allelomorphs.
B : Segregation of Mendelian factors (no linkage,
no crossing over) occurs during Anaphase I.
(1) If both statements are correct
(2) If both statements are incorrect
(3) If only statement A is correct
(4) If only statement B is correct
A : Point mutation may occur due to change in a
single base pair of DNA.
B : Sickle cell anemia is lymph disorder
(1) If both statements are correct
(2) If both statements are incorrect
(3) If only statement A is correct
(4) If only statement B is correct
Assertion:- Recessive characters are always pure.
Reason:- Recessive genes always express itself in
homozygous condition.
(1) If both Assertion & Reason are True and the Reason is a correct explanation of the Assertion.
(2) If both Assertion & Reason are True but the Reason is not a correct explanation of the Assertion.
(3) If Assertion is True but the Reason is false.
(4) If both Assertion & Reason are false.
Assertion:- A gamete contains a single allele for
any trait.
Reason:- During gametogenesis, the two alleles of
a trait segregate, one passing into each gamete at
random
(1) If both Assertion & Reason are True and the Reason is a correct explanation of the Assertion.
(2) If both Assertion & Reason are True but the Reason is not a correct explanation of the Assertion.
(3) If Assertion is True but the Reason is false.
(4) If both Assertion & Reason are false.
Assertion:- Test cross is a type of back cross.
Reason:- In test cross the F - hybrid is crossed 1
back with the homozygous recessive parent.
(1) If both Assertion & Reason are True and the Reason is a correct explanation of the Assertion.
(2) If both Assertion & Reason are True but the Reason is not a correct explanation of the Assertion.
(3) If Assertion is True but the Reason is false.
(4) If both Assertion & Reason are false.
Assertion:- Human exploited the variations that
were present naturally in the wild populations of
plants & animals.
Reason:- Variation is the degree by which progeny
resembles from their parents.
(1) If both Assertion & Reason are True and the Reason is a correct explanation of the Assertion.
(2) If both Assertion & Reason are True but the Reason is not a correct explanation of the Assertion.
(3) If Assertion is True but the Reason is false.
(4) If both Assertion & Reason are false.
