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Heredity & Evolution - 2


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20 Questions MCQ Test Science Class 10 | Heredity & Evolution - 2

Heredity & Evolution - 2 for Class 10 2022 is part of Science Class 10 preparation. The Heredity & Evolution - 2 questions and answers have been prepared according to the Class 10 exam syllabus.The Heredity & Evolution - 2 MCQs are made for Class 10 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Heredity & Evolution - 2 below.
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Heredity & Evolution - 2 - Question 1

Which of the following statement is not correct regarding variation in species?

Detailed Solution for Heredity & Evolution - 2 - Question 1

Only those variation which are useful and have advantage get selected.

Heredity & Evolution - 2 - Question 2

Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that

Heredity & Evolution - 2 - Question 3

Which of the following statement is incorrect ?

Detailed Solution for Heredity & Evolution - 2 - Question 3

The information coded in DNA (genes) is for only polypeptides (proteins). Insulin hormone is peptide and all enzyme are also proteins.

Heredity & Evolution - 2 - Question 4

The maleness of a child is determined by

Heredity & Evolution - 2 - Question 5

Genetic material is exchanged during

Detailed Solution for Heredity & Evolution - 2 - Question 5

During formation of gametes meiosis occurs resulting in exchange of genes by the process of crossing over.

Heredity & Evolution - 2 - Question 6

The fossil remains of Archaeopteryx is a connecting link between

Heredity & Evolution - 2 - Question 7

One tall pea plant and one dwarf pea plant on crossing resulted in 50% tall and 50% dwarf pea plant. The plants which were crossed were

Detailed Solution for Heredity & Evolution - 2 - Question 7


50% Tt Tall and 50% tt dwarf

Heredity & Evolution - 2 - Question 8

Wild cabbage has evolved into new varieties fike cabbage, broccoli and cauliflower by

Heredity & Evolution - 2 - Question 9

A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because

Detailed Solution for Heredity & Evolution - 2 - Question 9

All the progeny of this cross will have genotype Tt and a recessive gene cannot express itself in presence of dominant gene. A pea plant will be dwarf only when both the alleles are tt.

Heredity & Evolution - 2 - Question 10

Human offspring’s sex is determined

Heredity & Evolution - 2 - Question 11

If yellow seeded wrinkled pea plant (YYrr) is crossed with green seeded round pea plant (yyRR), the seeds produced in F1 generation are

Detailed Solution for Heredity & Evolution - 2 - Question 11

If a round, green seeded pea plant  is crossed with wrinkled, yellow seeded pea plant, the seeds produced in F1 generation are round and yellow.

Heredity & Evolution - 2 - Question 12

Natural selection is called ‘survival of the fittest'.Which of the following statements best describes an organism?

Heredity & Evolution - 2 - Question 13

A zygote which has an X chromosome inherited from the father will develop into a

Heredity & Evolution - 2 - Question 14

Which concept was not included in Charles Darwin’s theory of Natural Selection?

Heredity & Evolution - 2 - Question 15

In human males all the chromosomes are paired perfectly except
(i) 21st chromosome 
(ii) Y chromosome 
(iii) small chromosome
(iv) X chromosome 

Detailed Solution for Heredity & Evolution - 2 - Question 15

Human males have 23 pairs of autosomes and XY sex chromosomes.

Heredity & Evolution - 2 - Question 16

What is the difference between genetic drift and change due to natural selection?

Detailed Solution for Heredity & Evolution - 2 - Question 16

Both natural selection and genetic drift are mechanisms for evolution. The key distinction is that in genetic drift allele frequencies change by chance, whereas in natural selection allele frequencies change by differential reproductive success and genetic drift does not involve competition between members of species.

Heredity & Evolution - 2 - Question 17

Sex of a child is determined by

Detailed Solution for Heredity & Evolution - 2 - Question 17

Male produces two types of sperms 50% sperms have X chromosome and rest 50% have Y chromosome. If sperm having X chromosome fertilises ovum the sex of child will be female and in case sperm having Y chromosome fertilises the egg the child will be male.

Heredity & Evolution - 2 - Question 18

To study the natural phenomenon of inheritance, Mendel selected the pea plants. Which of the following properties were suitable for their studies?
(i) Plants would easily self pollinate or cross pollinate in nature.
(ii) Plants were easily grown in garden soil with a considerably shorter generation time.
(iii) Pea plants do not require the true-breeding for hybridisation experiments.
(iv) Many parts of the plant such as pod, seed, flower, cotyledons showed distinct phenotypes.

Detailed Solution for Heredity & Evolution - 2 - Question 18

Plant is easily grown in garden soil so it can be easily used for experiment. 
Mendels experiment is to prove that pure tall  and pure dwarf give different types of progency. So, he have to take a plant which have distinct phenotype. Therefore he used pea.

Heredity & Evolution - 2 - Question 19

The maleness of a child is determined by

Heredity & Evolution - 2 - Question 20

The more characteristics two species have in common :

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