Fossils are the remains or traces of ancient life that have been preserved by natural processes, from spectacular skeletons to tiny sea-shells. A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood, oil, coal, and DNA remnants.

Mendel crossed plants bearing red flowers (RR) with the plants bearing white flowers (rr) and produced progeny from them. The plants with red flowers obtained in F 1 generation were different from the plants with red flowers of the parental generation. Why? Explain with reasons.

Mendel performed crosses, which involved mating two true-breeding individuals that have different traits. A genetic trait is considered dominant if it is expressed in a person who has only one copy of that gene. A recessive trait is a trait that is expressed when an organism has two recessive alleles. In parent generation, plant bearing red flowers has both the dominant traits RR. In parent generation, plant bearing white flowers has both the recessive traits rr. F1 generation plant inherits one copy of dominant trait (red) and one copy of recessive trait (white) from the parental plants Rr. But only the dominant trait (red) is expressed.

Mendel crossed plants bearing red flowers (RR) with the plants bearing white flowers (rr) and produced progeny from them. The plants with red flowers obtained in F 1 generation were different from the plants with red flowers of the parental generation. Why? Explain with reasons.

Mendel performed crosses, which involved mating two true-breeding individuals that have different traits. A genetic trait is considered dominant if it is expressed in a person who has only one copy of that gene. A recessive trait is a trait that is expressed when an organism has two recessive alleles. In parent generation, plant bearing red flowers has both the dominant traits RR. In parent generation, plant bearing white flowers has both the recessive traits rr. F1 generation plant inherits one copy of dominant trait (red) and one copy of recessive trait (white) from the parental plants Rr. But only the dominant trait (red) is expressed.

Fossils are the remains or traces of ancient life that have been preserved by natural processes, from spectacular skeletons to tiny sea-shells. A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood, oil, coal, and DNA remnants.

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Karnataka Board-2018>Q 3

MEDIUM

10th Karnataka Board

IMPORTANT

Earn 100

What is a monohybrid cross? Write the genotypic ratio and phenotypic ratio of Mendel’s monohybrid cross.

Important Questions on Heredity and Evolution

HARD

10th Karnataka Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Karnataka Board-2018>Q 4

Carl Correns conducted a hybridization experiment using Four O'Clock plants. Draw the checkerboard of F₂ generation for the incomplete dominance phenomenon, when he crossed a homozygous plant having red flowers (RR) with another homozygous plant with white flowers (WW). Mention its genotypic ratio.

EASY

10th Karnataka Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Karnataka Board-2019>Q 5

A pure dominant pea plant producing round-yellow seeds is crossed with pure recessive pea plant producing wrinkled-green seeds. The number of plants bearing round-green seeds in the F1 generation of Mendel’s experiment is:

MEDIUM

10th Karnataka Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Karnataka Board-2019>Q 6

What are fossils?

HARD

10th Karnataka Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Karnataka Board-2019>Q 7

Write the differences between homologous organs and analogous organs.

MEDIUM

10th Karnataka Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Karnataka Board-2019>Q 8

Write the differences between the sex chromosomes of men and sex chromosomes of women.

MEDIUM

10th Karnataka Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Karnataka Board-2019>Q 9

The sex of a child is determined by the father. How?

MEDIUM

10th Karnataka Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Karnataka Board-2020>Q 10

Explain the two methods to estimate the age of fossils.

MEDIUM

10th Karnataka Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 9 - Heredity and Evolution>Karnataka Board-2020>Q 11

Mendel crossed plants bearing red flowers (RR) with the plants bearing white flowers (rr) and produced progeny from them. The plants with red flowers obtained in F₁ generation were different from the plants with red flowers of the parental generation. Why? Explain with reasons.

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