Principles of Inheritance and Variation Test

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Principles of Inheritance and Variation Test - 15

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Weekly Quiz Competition

Question 1
1 / -0

Study of family history about inheritance of particular trait for several generation is called

A
Flow chart

B
Pedigree analysis

C
Genetic recombination

D
Gene flow

Solution

The study of family history about the inheritance of particular trait over several generations is called pedigree analysis. It utilize the trace of the inheritance of specific trait.
Question 2
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Which genetic disorder is caused due to the presence of an additional copy of X-chromosome resulting into a karyotype of 47, XXY

A
Down’s Syndrome

B
Klinefelter’s Syndrome

C
Anemia

D
Turner’s Syndrome

Solution

Klinefelter’s Syndrome is genetic disorder that have overall masculine development due to presence of extra X sex chromosome. Such individuals are sterile.
Question 3
1 / -0

Which condition among the following is lethal?

A
2n-2

B
2n+2

C
2n+1

D
2n–1

Solution

2n is diploid normal condition. The organisms carrying two chromosomes less than normal (2n-2) is lethal for the organism.
Question 4
1 / -0

Which of the following is not a Mendelian disorder?

A
Hemophilia

B
Colour blindness

C
Down's syndrome

D
Thalassemia

Solution

Mendelian disorders are mainly determined by alteration or mutation in single gene. These disorders are transmitted to the offspring on the same line as principles of inheritance. Down’s syndrome is due to presence of additional copy of chromosome number 21.
Question 5
1 / -0

If a colour blind woman marries a normal vision man, their sons will be

A
All colour blind

B
1/2 colour blind and 1/2 normal

C
All normal visioned

D
3/4th colour blind and 1/4th normal

Solution

Colour blindness is sex-linked genetic disorder in which person is not able to detect the colour of the object. Red and green colour cannot be distinguished by them. It is carried by X-chromosome. Color blind woman transfer their X-chromosome to all offspring but daughter will be carrier and son will be all colour blind.
Question 6
1 / -0

A male human is heterozygous for autosomal genes A and B and is also homozygous for hemophilic gene h. What proportion of his sperms will be ABh?

A
1/4

B
1/32

C
1/16

D
1/8

Solution

Male human is heterozygous for autosomal genes A and B. He is homozygous for hemophilic gene h. 1/8th of their sperm will have AB trait. He is homozygous for h trait, so it will be present in all the sperm. Therefore, only 1/8 will carry ABh trait.
Question 7
1 / -0

Turner’s Syndrome is caused due to

A
Absence of one of the X chromosome

B
Additional copy of X chromosome

C
Additional copy of Y chromosome

D
Absence of both the X chromosome

Solution

Turner’s disease is chromosomal disorder due to absence of one of the X chromosomes. Such females are sterile as ovaries are rudimentary and lack secondary sexual characters.
Question 8
1 / -0

Which one of the following conditions in human is correctly matched with its chromosomal abnormality / linkage?

A
Erythroblastosis foetalis - X – linked

B
Klinefelter's syndrome - 44 autosomes +XXY

C
Colour blindness - Y – linked

D
Down's syndrome - 44 autosomes +XXY

Solution

Klinefelter's syndrome is due to presence of 44 autosomes +XXY sex chromosomes. Color blindness is X-linked recessive trait, Erythroblastosis foetalis is due to O-negative blood group and down’s syndrome is due to additional copy of chromosome number 21.
Question 9
1 / -0

Large thick and Swollen tongue and dropping lips"----- are the symptoms of which genetic disorder

A
Autosomal aneuploidy

B
Total number of chromosomes become 47

C
Down’s syndrome

D
Trisomy of 21st chromosome
Solution
Down's syndrome causes a distinct facial appearance, intellectual disability and developmental delays. It may be associated with thyroid or heart disease. People may experience:
- Developmental: short stature, delayed development, learning disability, or speech delay in a child
- Cognitive: intellectual disability or difficulty thinking and understanding
- Mouth: abnormally large tongue or displacement of the tongue

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Re-Attempt Weekly Quiz Competition

Principles of Inheritance and Variation Test - 15

Result

Principles of Inheritance and Variation Test - 15

Score

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Rank

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SHARING IS CARING

Question 1

Flow chart

Pedigree analysis

Genetic recombination

Gene flow

Solution

Question 2

Down’s Syndrome

Klinefelter’s Syndrome

Anemia

Turner’s Syndrome

Solution

Question 3

2n-2

2n+2

2n+1

2n–1

Solution

Question 4

Hemophilia

Colour blindness

Down's syndrome

Thalassemia

Solution

Question 5

All colour blind

1/2 colour blind and 1/2 normal

All normal visioned

3/4th colour blind and 1/4th normal

Solution

Question 6

1/4

1/32

1/16

1/8

Solution

Question 7

Absence of one of the X chromosome

Additional copy of X chromosome

Additional copy of Y chromosome

Absence of both the X chromosome

Solution

Question 8

Erythroblastosis foetalis - X – linked

Klinefelter's syndrome - 44 autosomes +XXY

Colour blindness - Y – linked

Down's syndrome - 44 autosomes +XXY

Solution

Question 9

Autosomal aneuploidy

Total number of chromosomes become 47

Down’s syndrome

Trisomy of 21st chromosome

Solution

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