Principles of Inheritance and Variation Test

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Principles of Inheritance and Variation Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Type of gamete participating in selfing of members in monohybrid cross are

A
One type

B
Two types

C
Four types

D
Many types

Solution

Type of gametes participating in selfing of members in monohybrid cross is of one type.

For example in a monohybrid cross of TT and tt, the first generation offsprings have Tt genotype. So for cross or selfing to be done between them, there is only one type of gamete formed by them i.e. Tt.
Question 2
1 / -0

Which of the following is an exception to Mendel's Law

A
Co-dominance

B
Law of segregation

C
Law of independent assortment

D
Law of dominance

Solution

According to Law law of dominance, one of the factors for a pair of inherited traits will be dominant and the other recessive, unless both factors are recessive. However, both alleles are expressed equally. A genetic scenario where neither allele is dominant. or recessive and both get expressed is known as codominance
Question 3
1 / -0

Mendel's laws of independent assortment is

A
Applicable to all genes on all chromosomes

B
Applicable to all dominant genes

C
Is applicable when genes are on same chromosomes

D
Is not applicable when genes are on same chromosomes

Solution

Mendel's law of independent assortment is applicable when genes are located on different chromosomes.
Question 4
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Criss cross inheritance means

A
X chromosome from female will pass to female of next-generation

B
X chromosome from female will pass to female of next-generation

C
X chromosome from male will pass to a male of next generation

D
none of the above

Solution

The transmission of a gene from mother to son or father to daughter is known as Criss cross inheritance; e.g. in X-chromosome linkage.
Question 5
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The evidence that crossing over occurs at four stranded stage and not at two stranded stage of the chromosomes, comes from

A
2 : 2 : 2 : 2 arrangement of ascospores in Neurospora

B
4 : 4 arrangement of ascospores in Neurospora

C
Studies of meiosis in maize

D
Studies on linkage maps of chromosomes in Drosophila

Solution

In Neurospora is produces 4 types of ascospores two of one parental type, two of other parental type, two of one recombinant and another two of second recombinant type.
Question 6
1 / -0

Match the genetic phenomena with their respective ratios.

Column I

A. Inhibitory gene ratio
B. Complementary gene ratio
C. Recessive epistasis ratio
D. Dominant epistasis ratio

Column II

1. 9:3:4
2. 12:3:1
3. 13:3
4. 9:7

A
A-4, B-3, C-2, D-1

B
A-3, B-4, C-1, D-2

C
A-2, B-1, C-3, D-4

D
A-3, B-2, C-1, D-4

Solution

Inhibitory gene ratio is 13 : 3, complementary gene ratio is 9 : 7. Recessive epistasis ratio is 9 : 3 : 4, and dominant epistasis ratio is 12 : 3 : 1.
Question 7
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Who proposed the concept of jumping genes?

A
Barbara McClintock working on Zea.

B
Morgan working on Drosophila.

C
Beadle working on Neurospora.

D
Lederberg working on E.coli

Solution

Transposable elements, also known as “jumping genes”, are DNA sequences that move from one location on the genome to another. These elements were first identified by geneticist Barbara McClintock in maize plant.
Question 8
1 / -0

What is the unit of crossing over

A
Cistron

B
Muton

C
Recon

D
None of these

Solution

Recon - Unit of recombination

Muton - Unit of mutation

Cistron - Unit of function

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Re-Attempt Weekly Quiz Competition

Principles of Inheritance and Variation Test - 2

Result

Principles of Inheritance and Variation Test - 2

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SHARING IS CARING

Question 1

One type

Two types

Four types

Many types

Solution

Question 2

Co-dominance

Law of segregation

Law of independent assortment

Law of dominance

Solution

Question 3

Applicable to all genes on all chromosomes

Applicable to all dominant genes

Is applicable when genes are on same chromosomes

Is not applicable when genes are on same chromosomes

Solution

Question 4

X chromosome from female will pass to female of next-generation

X chromosome from female will pass to female of next-generation

X chromosome from male will pass to a male of next generation

none of the above

Solution

Question 5

2 : 2 : 2 : 2 arrangement of ascospores in Neurospora

4 : 4 arrangement of ascospores in Neurospora

Studies of meiosis in maize

Studies on linkage maps of chromosomes in Drosophila

Solution

Question 6

A-4, B-3, C-2, D-1

A-3, B-4, C-1, D-2

A-2, B-1, C-3, D-4

A-3, B-2, C-1, D-4

Solution

Question 7

Barbara McClintock working on Zea.

Morgan working on Drosophila.

Beadle working on Neurospora.

Lederberg working on E.coli

Solution

Question 8

Cistron

Muton

Recon

None of these

Solution

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