Heredity and Evolution (10 Science)
Heredity is the process of passing traits from parents to offspring. Understanding heredity helps us comprehend how characteristics are inherited across ge
TL;DR: Heredity is the process of passing traits from parents to offspring. Understanding heredity helps us comprehend how characteristics are inherited acro…
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Heredity is the process of passing traits from parents to offspring. Understanding heredity helps us comprehend how characteristics are inherited across ge
Heredity and Evolution MCQs with Answers & Explanations
Q1. What is the unit of heredity called?
- Chromosome
- Gene ✓ (correct)
- Allele
- Nucleus
Q2. Who is known as the father of genetics?
- Charles Darwin
- Gregor Mendel ✓ (correct)
- Louis Pasteur
- Robert Hooke
Q3. In Mendel's monohybrid cross, what was the phenotypic ratio in F2 generation?
- 1:1
- 1:2:1
- 3:1 ✓ (correct)
- 9:3:3:1
Q4. What are alleles?
- Different genes on same chromosome
- Different forms of the same gene ✓ (correct)
- Recessive genes only
- Dominant genes only
Q5. Which of the following is a dominant trait in humans?
- Red hair
- Blue eyes
- Rolling tongue ✓ (correct)
- Attached earlobes
Q6. What is a homozygous genotype?
- Aa
- AA or aa ✓ (correct)
- Aa or Bb
- Different alleles
Q7. In a test cross, what is the ratio obtained when a homozygous dominant is crossed with homozygous recessive?
- 1:1
- 3:1
- 1:2:1
- All dominant ✓ (correct)
Q8. Which chromosome pair determines the sex in humans?
- Chromosome 1
- Chromosome 23 ✓ (correct)
- Chromosome 10
- Chromosome 5
Q9. What is a variation in biology?
- Mutation in genes
- Differences between individuals of same species ✓ (correct)
- Change in environment
- Disease in organism
Q10. Which process leads to evolution according to Darwin?
- Adaptation
- Natural selection ✓ (correct)
- Mutation
- Genetic drift
Frequently Asked Questions
What is the difference between dominant and recessive traits?
Dominant traits are expressed in heterozygous (Aa) individuals, while recessive traits appear only in homozygous recessive (aa) individuals. A dominant allele masks the effect of a recessive allele.
Can two brown-eyed parents have a blue-eyed child?
Yes, if both parents are heterozygous for the brown eye trait (Bb). Each can contribute the recessive blue eye allele (b), resulting in a blue-eyed child (bb).
More 10 Science MCQs
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- Life Processes
- Carbon and its Compounds
- Metals and Non-metals
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