Chapter 8: Heredity – From Parent to Offspring — Online MCQ Test
BIOLOGY · CLASS 10th · Telangana State Board
Practice Chapter 8: Heredity – From Parent to Offspring with a free chapter-wise online MCQ test.
This chapter covers: Diving into genetics this chapter explains how physical traits pass down across generations. It covers Gregor Mendel's foundational experiments with pea plants monohybrid and dihyb....
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 8: Heredity – From Parent to Offspring — Important Questions & Answers
Who is known as the 'Father of Genetics' for his pioneering work with pea plants?
- A. Gregor Mendel
- B. Charles Darwin
- C. Louis Pasteur
- D. Jean Baptiste Lamarck
Answer: A. Gregor Mendel
Gregor Mendel conducted experiments with pea plants and established the fundamental laws of inheritance, earning him the title 'Father of Genetics'.
Gregor Mendel conducted experiments with pea plants and established the fundamental laws of inheritance, earning him the title 'Father of Genetics'.
What is the basic unit of heredity that carries genetic information?
- A. Chromosome
- B. Gene
- C. Ribosome
- D. Nucleolus
Answer: B. Gene
A gene is the basic unit of heredity that codes for specific traits and is passed from parents to offspring through DNA.
A gene is the basic unit of heredity that codes for specific traits and is passed from parents to offspring through DNA.
In a monohybrid cross between two heterozygous individuals (Aa × Aa), what is the expected phenotypic ratio in the F2 generation?
- A. 1:1
- B. 1:2:1
- C. 3:1
- D. 9:3:3:1
Answer: C. 3:1
A monohybrid cross between two heterozygotes (Aa × Aa) produces a 3:1 phenotypic ratio (3 dominant : 1 recessive) in the F2 generation, demonstrating Mendel's law of segregation.
A monohybrid cross between two heterozygotes (Aa × Aa) produces a 3:1 phenotypic ratio (3 dominant : 1 recessive) in the F2 generation, demonstrating Mendel's law of segregation.
How does natural selection contribute to evolution and the development of new species?
- A. By randomly changing all traits in a population
- B. By favoring organisms with advantageous traits that improve survival and reproduction
- C. By preventing any genetic variation in populations
- D. By creating new genes that did not previously exist
Answer: B. By favoring organisms with advantageous traits that improve survival and reproduction
Natural selection favors organisms with beneficial traits, increasing their reproductive success and passing these advantageous genes to offspring, driving evolutionary change and speciation.
Natural selection favors organisms with beneficial traits, increasing their reproductive success and passing these advantageous genes to offspring, driving evolutionary change and speciation.
In a testcross between an organism displaying a dominant phenotype and a homozygous recessive organism, a 1:1 ratio in offspring indicates what about the organism with the dominant phenotype?
- A. It is definitely homozygous dominant
- B. It is definitely heterozygous
- C. It could be either homozygous dominant or heterozygous
- D. It is homozygous recessive
Answer: B. It is definitely heterozygous
A 1:1 ratio in a testcross indicates the dominant organism is heterozygous (Aa), as it produces both dominant and recessive offspring when crossed with homozygous recessive (aa).
A 1:1 ratio in a testcross indicates the dominant organism is heterozygous (Aa), as it produces both dominant and recessive offspring when crossed with homozygous recessive (aa).