Biology

1. Given below is a pedigree chart of a family with five children. It shows the inheritance of attached earlobes 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?

The parents are heterozygous

The parents are homozygous recessive

The trait is Y-linked

The parents are homozygous dominant

Question 1 of 15

2. Wobble hypothesis was given by

Holley

Nirenberg

Khorana

F.H.C. Crick

Question 2 of 15

3. Which one of the following pairs of terms/names mean one and the same thing?

Gene pool-genome

Cistron-triplet

Codon-gene

DNA fingerprinting –DNA profiling

Question 3 of 15

4. Frame shift mutation occurs when

None of the above

Base is added or deleted

Base is deleted

Base is added

Question 4 of 15

5. Discontinuous variations are

Mutations

Acquired characters

Essential features

Non-essential changes

Question 5 of 15

6. The Structure of DNA is

Single helix

Triple helix

Linear

Double helix

Question 6 of 15

7. Balbiani rings are found in

Polysomes

Polytene chromosomes

Nonsense chromosomes

Autosomes

Question 7 of 15

8. If a homozygous tall plant is crossed with homozygous dwarf plant, the off springs will be

Half dwarf plants

All dwarf plants

Half tall plants

All tall plants

Question 8 of 15

9. If a homozygous red flowered plant is crossed with a homozygous white flowered plant, the off springs would be

Half red flowered

All white flowered

Half white flowered

All red flowered

Question 9 of 15

10. What is true about t-RNA?

It binds with an amino acid at it 3’ end.

It looks like clover leaf in the three dimensional structure

It has a codon at one end which recognizes the anticodon on messenger RNA.

It has five double stranded regions.

Question 10 of 15

11. How many different types of gametes can be formed by F₁ progeny, resulting from the following cross Tt x Rr?

Question 11 of 15

12. 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?

One third

Less than 5 percent

Half

None of these

Question 12 of 15

13. Polygenic genes show

Different phenotype

Different genotype

Similar genotype

Different karyotype

Question 13 of 15

14. XO chromosomal abnormality in humans causes

Turner’s syndrome

Down’s syndrome

Klinefelter’s syndrome

Patau’s syndrome

Question 14 of 15

15. Restriction endonucleases are used as

Molecular degradation to DNA breakup

Molecular build up at nucleotides

Molecular cement to combine DNA sites

Molecular knives for cutting DNA at specific sites

Question 15 of 15

Test Name	Biology Genetics Test Online MCQs
Subject	Biology
Test Type	MCQs
Total Question	15
Total Marks	30
Total Time	15 Mints
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Test By Subject	Biology
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Biology Genetics Test Online MCQs

Biology Genetics Test Online MCQs

Biology

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