Heredity and Evolution Test

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Heredity and Evolution Test - 12

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Weekly Quiz Competition

Question 1
1 / -0

Assertion: We have lost all the direct evidence of the origin of life.
Reason: The people responsible to protect the evidence were not skilled.

A
If both the assertion and the reason are true and the reason is a correct explanation of the assertion

B
If both the assertion and reason are true but the reason is not a correct explanation of the assertion

C
If the assertion is true but the reason is false

D
If both the assertion and reason are false

E
If the assertion is false but reason is true

Solution

During the profound changes that have been taking place since the remote past, we have lost the direct evidence of the origin of life. Due to these changes, the scientists, though skilled were not able to protect the evidence.
Question 2
1 / -0

The term for similarity in organ structure seen in great diversity is

A
Homology

B
Identical

C
Analogy

D
Symmetrical

Solution

Homologous organs show similarities in organ structure despite great diversity because they share a common ancestry. For example, forelimbs of birds, bats, whales, and humans show an immense diversity but show the same structural plan because they share a common ancestry.
So, the correct answer is 'Homology'.
Question 3
1 / -0

The belief that the mother is completely responsible for the sex of the child is wrong, because the child

A
Gets sex determining chromosome only from the mother

B
Develops in the body of the mother

C
Gets one sex chromosome from the mother and the other from the father

D
Gets sex determining chromosome only from the father
Solution
- The male sex gametes possess X and Y chromosomes, and the female sex gametes possess two X chromosomes.
- The sex of the child depends on the gamete of the male which fuses with the female. If the X gamete fuses, the zygote formed has the XX chromosomes which form a girl child whereas, the male child is formed by the zygote with the XY chromosome content.
So, the correct answer is option D.
Question 4
1 / -0

What are alleles?

A
A pair of genes governing a specific trait such as tallness or dwarfness.

B
Genes which are inactive.

C
Genes determining sex.

D
A pair of genes present only on heterozygous chromosomes.
Solution
- An allele is one of the two, or more, forms of a given gene variant that is located at a specific position on a specific chromosome.
- In nature, alleles can be inherited as dominant, recessive, or codominant alleles. For example, in pea plants, the gene for plant height has two alleles - one for tall trait and the other for the dwarf trait; the gene for seed shape has one allele for the round shape of the seed and the other one for wrinkled shape of the seed.
- So, the correct answer is option A.
Question 5
1 / -0

The wings of birds are homologous to man's

A
Legs

B
Shoulder

C
Toes alone

D
Fore arms

Solution

Wings of birds are homologous to man's forearms. Both are supported by same set of bones i.e. Humerus, Radius, Ulna, Carpals and Metacarpals.
So, the correct answer is 'Fore arms'
Question 6
1 / -0

The wings of an insect and a bat exhibit _______.

A
Homology

B
Analogy

C
Ancestry

D
Tautology
Solution
The wings of an insect and a bat exhibit analogy. The analogy is shown by analogous structures which means those structures that are structurally different but functionally similar. Insects and bats use their wings for flight.
So, the function of wings in both organisms is the same but structurally are different. Also, both organisms do not share a common ancestor. Therefore, the wings of a bat and the wings of an insect are analogous organs.
Thus, the correct answer is option B.
Question 7
1 / -0

Which of the following plants was selected by Mendel for his experiment?

A
Garden pea

B
Pigeon pea

C
Sweet pea

D
Moong

Solution

Mendel's work on genetics was mainly concentrated on Pisum sativum, otherwise known as garden pea plant. He took 7 characters into consideration. The characters chosen were:
1. Flower colour - purple or white
2. Flower position - axial or terminal
3. Stem length - long or short
4. Pod shape - inflated or constricted
5. Pod colour - yellow or green
6. Seed shape - round or wrinkled
7. Seed colour - yellow or green
So, the correct answer is option A.
Question 8
1 / -0

In heredity, the genes are obtained from

A
Father

B
Mother

C
Both

D
None of the above

Solution

Heredity is the passing on of traits from parents(i.e both father and mother) to their offspring, either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents.

So, the correct answer is 'Both'.
Question 9
1 / -0

When two individuals are similar in external appearance but differ in their genetic make-up, they are said to have the same:

A
Phenotype

B
Genotype

C
Homozygous

D
Both A and C
Solution
The characters of an organism that are visible are known as phenotypes and a genotype is defined as the unique genetic constitution of a living organism. Now, the same phenotype may or may not belong to the same genotype.
As an example, the genotype of a tall plant can be (TT) or (Tt), but phenotypically both the genotypes will produce tall plants.
A homozygous genotype may include two normal alleles or two alleles that have the same variant.
So, the correct answer is option A.
Question 10
1 / -0

Mendelism is related with

A
Heredity in living beings

B
Meiosis during sexual reproduction

C
Mutation in living organisms

D
None of the above

Solution

Mendelism is related to heredity. The prominent law given by Mendel proved its relationship with inheritance.
The law of segregation states that each character is regulated by a gene which exists in two forms for a particular character known as allele which segregates into different gametes.
The law of independent assortment states that alleles for separate traits are passed independently of one another from parents to offspring.
So, the correct answer is option A.

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Heredity and Evolution Test - 12

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Heredity and Evolution Test - 12

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Question 1

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

If both the assertion and reason are true but the reason is not a correct explanation of the assertion

If the assertion is true but the reason is false

If both the assertion and reason are false

If the assertion is false but reason is true

Solution

Question 2

Homology

Identical

Analogy

Symmetrical

Solution

Question 3

Gets sex determining chromosome only from the mother

Develops in the body of the mother

Gets one sex chromosome from the mother and the other from the father

Gets sex determining chromosome only from the father

Solution

Question 4

A pair of genes governing a specific trait such as tallness or dwarfness.

Genes which are inactive.

Genes determining sex.

A pair of genes present only on heterozygous chromosomes.

Solution

Question 5

Legs

Shoulder

Toes alone

Fore arms

Solution

Question 6

Homology

Analogy

Ancestry

Tautology

Solution

Question 7

Garden pea

Pigeon pea

Sweet pea

Moong

Solution

Question 8

Father

Mother

Both

None of the above

Solution

Question 9

Phenotype

Genotype

Homozygous

Both A and C

Solution

Question 10

Heredity in living beings

Meiosis during sexual reproduction

Mutation in living organisms

None of the above

Solution

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