Scribd
Upload
8K views2 pages

CL 10 Sci Heredity Unit Paper

This document contains 20 multiple choice and short answer questions about heredity and evolution for a Class 10 unit test. The questions cover topics such as defining inheritance, heredity, phenotype, and genotype. They also address how variation promotes survival, Mendel's experiments on dominant and recessive traits, how genes regulate plant height, sex determination in humans, what fossils are and how they are formed, distinguishing between types of crosses and traits, using Punnett squares to model genetic crosses, homologous and analogous structures providing evidence of common ancestry, using pedigree analysis to determine if an trait is dominant or recessive, evidence for the origin of life from non-living matter, the structure and role of DNA, estimating the age of fossils

Uploaded by

deep_72
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
8K views2 pages

CL 10 Sci Heredity Unit Paper

This document contains 20 multiple choice and short answer questions about heredity and evolution for a Class 10 unit test. The questions cover topics such as defining inheritance, heredity, phenotype, and genotype. They also address how variation promotes survival, Mendel's experiments on dominant and recessive traits, how genes regulate plant height, sex determination in humans, what fossils are and how they are formed, distinguishing between types of crosses and traits, using Punnett squares to model genetic crosses, homologous and analogous structures providing evidence of common ancestry, using pedigree analysis to determine if an trait is dominant or recessive, evidence for the origin of life from non-living matter, the structure and role of DNA, estimating the age of fossils

Uploaded by

deep_72
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 2

CLASS 10 - Heredity and Evolution – Unit Test Paper

Q1: Define the following:


a) Inheritance
b) Heredity
c) Phenotype
d) Genotype

Q2: How does the creation of variation in a species promote survival?

Q3: Give scientific reasons:


i. In sexual mode of reproduction greater diversities are generated.
ii. Phenotypic and genotypic ratios are different.
iii. A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall
plants

Q4: How do genes regulate the height of a plant ?

Q5: How is the sex of the child determined in human beings?

Q6: How do Mendel’s experiments show that traits may be dominant or recessive?

Q7: How do Mendel’s experiments show that traits are inherited independently?

Q8: What are fossils ? How are they formed ?

Q9: Distinguish between:


i. Monohybrid cross and Dihybrid cross
ii. Dominant characters and Recessive characters.
iii. Analogous organs and Homologous organs.
iv. Acquired Traits and Inherited Traits.

Q10: With the help of a diagram (Punnett square) show a Mendelian experiment where tall pea
plant bearing red flowers is crossed with a short pea plant bearing white flowers. Write both the
phenotypic and genotypic ratio for F2 generation.

Q11: The human hand, the cat paw and horse foot, when studied in detail show the same structure
of bones and point towards a common origin.
(a) What do you conclude from this ?
(b) What is the term given to such structures ?

Q12: A study found that children with light-coloured eyes are likely to have parents with light-
coloured eyes. On the basis, can we say anything about whether the light eye colour trait is
dominant or recessive? Why or why not?

Q13: What evidence do we have for the origin of life from inanimate matter?

Q14: Write the full form of DNA. Name the part of the cell where it is located. Explain its role in
the process of reproduction of the cell.

Q15: How can the estimation of the age of fossils be done?


CLASS 10 - Heredity and Evolution – Unit Test Paper

Q16: Briefly explain the role of natural selection and genetic drift in speciation by citing an
example.

Q17: Explain the role of artificial selection by humans helped in the evolution of different
vegetable? Explain by giving a suitable example.

Q18: Define the term of 'evolution'. “Evolution cannot be equated with progress”. Justify the
statement.

Q19: Why are thorn of Bougainvillea plant and a tendril of Passifora plant considered homologus?

Q20: Mendel crossed a plant having inflated green pod with constricted yellow pod.
(a) What type of a cross is it?
(b) What type of plants are obtained in F1?
(c) In F2 generation the phenotype ratio is 9:3:3:1. State the rule for the inheritance of traits
observed by Mendel.

You might also like