Biology
High School (9–10)
General
Heredity and Evolution › Heredity and InheritanceHeredity and Evolution › EvolutionChapter 7Heredity
Why do you have your mother's eyes but your grandfather's chin? Children resemble their parents, yet no two are exactly alike. In this chapter you see how variation arises, follow Mendel's experiments with pea plants, learn how genes control traits, and find out how the sex of a baby is decided. Python crosses pea plants for you and counts the ratios Mendel found.
Part of Biology · High School (9–10) (chapter 7)
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Variation and Mendel's Experiments
Why offspring differ from their parents, and how Mendel's pea plants revealed dominant and recessive traits, the 3:1 ratio and the 9:3:3:1 ratio.
How Traits Are Expressed, and Sex Determination
How a gene makes a protein that shows as a trait, how genes sit on chromosomes and pass on, and how the sex of a child is decided.