Heredity and Evolution Test

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Heredity and Evolution Test - 26

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Weekly Quiz Competition

Question 1
1 / -0

Who proposed the hypothesis that life must have developed from the simple inorganic molecules which were present on earth soon after it was formed?

A
Miller

B
Urey

C
Darwin

D
Haldane
Solution
- J.B.S. Haldane, a British scientist, suggested in 1929 that life must have developed from the simple inorganic molecules which were present on earth soon after it was formed.
- He speculated that the conditions on earth at that time, which were far from the conditions we see today, could have given rise to more complex organic molecules that were necessary for life. The first primitive organisms would arise from further chemical synthesis.
- So, the correct answer is option D.
Question 2
1 / -0

The $$F_2$$ generation will show maximum percentage of __________ allele.

A
Single

B
Recessive

C
Dominant

D
None of the above

Solution

Three-quarters of the $$F_2$$ generation will have the dominant allele's phenotype. And the remaining one-quarter of the $$F_2$$ will have the recessive allele's phenotype. Therefore, (c) is the correct answer.
Question 3
1 / -0

In a monohybrid cross each parent should be ___________

A
Heterozygous

B
Dominant

C
Homozygous

D
Recessive

Solution

Each parent is chosen to be homozygous. One parent is homozygous for one allele, while the other parent is homozygous for the other allele. Therefore, (c) is the correct answer.
Question 4
1 / -0

Genetic trait is represented by _______________

A
Vowel

B
One letter

C
Two letters

D
Three letters

Solution

Each genetic locus is always represented by two letters. For example in the case of eye color, B represents brown eyes and b represents blue eyes which shows the resultant trait as Bb.
Therefore, the correct answer is option C.
Question 5
1 / -0

Characteristics that have arisen as a result of common evolutionary descent are said to be:

A
Analogous

B
Homogenous

C
Heterogamous

D
Homologous

E
All of the above
Solution
Homologues are characteristics that arise in related groups of organisms due to their common evolutionary descent.
Analogous are characteristics in organisms with similar structure or function but have no evolutionary link in their development.
Homogenous means any structure with uniform composition or uniform proportion of its components.
Heterogamous refers to the existence of different forms of reproduction in the same organism.
The correct answer 'Homologues'.
Question 6
1 / -0

Who described role of natural selection in speciation?

A
Orator F. Cook

B
Charles Robert Darwin

C
J.B.S Haldane

D
None of these

Solution

Speciation is the term used for the development of new species by changes in population. Charles Darwin was the first to describe role of natural selection in speciation. Therefore, (b) is the correct answer.
Question 7
1 / -0

Which of the following factors can give rise to new species?

A
Travel from one site to another

B
Mating in the existing population

C
Mating at different area of sub population

D
Both A and C
Question 8
1 / -0

According to Charles Robert Darwin all species were established from ______________.

A
Uncommon ancestors

B
Common ancestors

C
Different individuals

D
None of the above

Solution

Charles Darwin established that all species of life have descended over time from common ancestors. He did not know about Mendels experiment on inheritance which would have helped him study his work more easily. Therefore, (b) is the correct answer.
Question 9
1 / -0

What are the dissimilarities between birds and bats wings that makes them analogous?

A
Function

B
Size

C
Structure

D
None of these

Solution

Though both use their wings for flying; the wings of bats are skin folds stretched mainly between elongated fingers. But, the wings of birds are a feathery covering all around the arm. This shows the difference in the structure of their wings. Therefore, (c) is the correct answer.
Question 10
1 / -0

Traits which are similar but not related are called as ___________________

A
Homologous

B
Analogous

C
Acquired

D
Inherited

Solution

Some organisms have traits similar to each other because of some reason but they are not related, like the wings of birds and bats which are used for flying purpose but they do not evolve from a common ancestor. Therefore, (b) is the correct answer.

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Re-Attempt Weekly Quiz Competition

Heredity and Evolution Test - 26

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Heredity and Evolution Test - 26

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Question 1

Miller

Urey

Darwin

Haldane

Solution

Question 2

Single

Recessive

Dominant

None of the above

Solution

Question 3

Heterozygous

Dominant

Homozygous

Recessive

Solution

Question 4

Vowel

One letter

Two letters

Three letters

Solution

Question 5

Analogous

Homogenous

Heterogamous

Homologous

All of the above

Solution

Question 6

Orator F. Cook

Charles Robert Darwin

J.B.S Haldane

None of these

Solution

Question 7

Travel from one site to another

Mating in the existing population

Mating at different area of sub population

Both A and C

Question 8

Uncommon ancestors

Common ancestors

Different individuals

None of the above

Solution

Question 9

Function

Size

Structure

None of these

Solution

Question 10

Homologous

Analogous

Acquired

Inherited

Solution

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