Principles of Inheritance and Variation NEET questions | Class 12 | Online Test 03 17

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Principles of Inheritance and Variation MCQ | Principles of Inheritance and Variation NEET questions | Principles of Inheritance and Variation Class 12 important questions

Heredity and Variation: MCQs Quiz - 3

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Question 1
A character which is expressed in a hybrid is called
A
Dominant
B
Recessive
C
Co-dominant
D
Epistatic
Question 2
How many different kinds of gametes will be produced by a plant having the genotype AABbCC?
A
Three
B
Four
C
Nine
D
Two
Question 3
If a colourblind woman marries a normal visioned man, their sons will be
A
Three-fourths colourblind and one-fourth normal
B
One-half colourblind and one-half normal
C
All normal visioned
D
All colourblind
Question 4
Lysosomes and ribosomes
A
Lysosomes and ribosomes
B
Ribosomes and chloroplast
C
Endoplasmic reticulum and mitochondria
D
Mitochondria and chloroplasts
Question 5
Genes for cytoplasmic male sterility in plants are generally located in:
A
Nuclear-genome
B
Mitochondrial genome
C
Chloroplast genome
D
Cytosol
Question 6
A polygenic trait is controlled by 3 genes A, B and C. In a cross AaBbCc × AaBbCc, the phenotypic ratio of the offsprings was observed as 1 : 6 : x : 20 : x : 6 : 1. What is the possible value of x?
A
3
B
9
C
15
D
25
Question 7
A common test to find the genotype of a hybrid is by:
A
Crossing of one F1 progeny with male parent
B
Crossing of one F2 progeny with male parent
C
Crossing of one F2 progeny with female parent
D
Studying the sexual behaviour of F1 progenies
Question 8
A man and a women, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughter and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease?
A
Sex-linked recessive
B
Autosomal dominant
C
Sex-limited recessive
D
Sex-linked dominant
Question 9
A person with unknown blood group under ABO system, has suffered much blood loss in an accident and needs immediate blood transfusion. His one friend who has a valid certificate of his own blood type, offers for blood donation without delay. What would have been the type of blood group of the donor friend?
A
Type A
B
Type B
C
Type AB
D
Type O
Question 10
A self-fertilizing trihybrid plant forms:
A
8 different gametes and 32 different zygotes
B
8 different gametes and 16 different zygotes
C
8 different gametes and 64 different zygotes
D
4 different gametes and 16 different zygotes
Question 11

Assertion: An organism with lethal mutation may not even develop beyond the zygote stage.

Reason: All types of gene mutations are lethal.

A
Both assertion and reason are true and the reason is the correct explanation of the assertion.
B
Both assertion and reason are true but the reason is not the correct explanation of the assertion.
C
Assertion is true statement but reason is false.
D
Both assertion and reason are false.
Question 12
Excessive growth of hair on the pinna is a feature found only in males because
A
The gene responsible for the character is recessive in females and dominant only in males
B
The character is induced in males as males produce testosterone
C
The female sex hormone estrogen suppresses the character in females
D
The gene responsible for the character is present on the Y chromosome only
Question 13
Given below is a pedigree chart of a family with five children. It shows the inheritance of attached ear lobes as opposed to the free ones. The squares represent the male individuals and circles the female individuals. Which one of the following conclusions drawn is correct?
A
The parents are homozygous recessive
B
The trait is Y-linked
C
The parents are homozygous dominant
D
The parents are heterozygous
Question 14
Grain colour in wheat is determined by three pairs of polygene. Following the cross AABBCC (dark colour) x aabbcc (light colour), in F2-generation what proportion of the progeny is likely to resemble either parent
A
One fourth
B
Less than 5 percent
C
One third
D
None of these
Question 15
Haemophilia is more commonly seen in human males than in human females because
A
This disease is due to a Y-linked recessive mutation
B
This disease is due to an X-linked recessive mutation
C
This disease is due to an X-linked dominant
D
A greater proportion of girls die in infancy
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17 thoughts on “Principles of Inheritance and Variation NEET questions | Class 12 | Online Test 03”

  • Reply ↓
    sima

    chloroplast also show cytoplasmic male sterility sir plz put the question correctly,i can not understand question no7 ans,plz describe the ans correctly.

  • Reply ↓
    sai prasad

    The questions are quite curious and very impressive.

  • Reply ↓
    Abanita sharma

    Thnx for the questions..they r very gud

  • Reply ↓
    minakshi singh

    please provide feedback of each answers

  • Reply ↓
    khushbu

    sir,
    plz consider que 4…and pls provide solution for conceptual questions