Heredity - Evolution
Kerala Board · Class 10 · Biology
Quick revision notes for Heredity - Evolution — Kerala Board Class 10 Biology. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Variations and New Characters
- Variations are differences in characters within closely related groups of organisms
- Variations arise during reproduction due to sexual reproduction and errors in DNA copying
- Variations can be inherited and passed to offspring
Mendel's Experiments and Laws
- Gregor Mendel is known as the 'Father of Genetics'
- Mendel used pea plants for experiments due to well-defined characters, bisexual flowers, self-pollination capability, and annual nature
- Studied seven contrasting characters: flower color, position, seed color, shape, pod color, shape, and stem length
Sex Determination in Humans
- Humans have 23 pairs of chromosomes (46 total)
- 22 pairs are autosomes, 1 pair are sex chromosomes
- Females have XX sex chromosomes, males have XY
Evolution and Natural Selection
- Evolution is the process by which species change over time
- Variations provide raw material for evolution
- Natural selection acts on variations
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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