Inheritance and variation of traits
12 videos
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12
Biology - Inheritance and Variation of Traits — What You Need to Know
This video explains why siblings look different through sexual reproduction, chromosomes, and genetic variation. It covers diploid vs haploid cells and fertilization.
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Biology - Meiosis — How Your Body Makes Gametes
This video explains meiosis, the process that turns one diploid cell into four genetically unique haploid gametes through two rounds of division for reproduction.
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Biology - Crossing Over and Genetic Shuffling
Explains why siblings don't look identical through meiosis processes: crossing over creates new gene combinations, and independent assortment randomly distributes chromosomes.
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Biology - Genetics Vocabulary You Need to Know
Learn 8 essential genetics terms: gene, allele, genotype, phenotype, dominant, recessive, homozygous, and heterozygous explained with simple examples.
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Biology - Mendelian Inheritance and Punnett Squares
Learn how Mendel discovered dominant and recessive alleles through pea plant experiments, and how Punnett squares predict the 3:1 inheritance ratio.
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Biology - Solving a Monohybrid Punnett Square
Learn how to use a Punnett square to predict offspring traits. This video explains genotype and phenotype ratios using cat fur color as an example.
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Biology - Dihybrid Crosses and Independent Assortment
Learn how dihybrid crosses track two traits simultaneously using a 4x4 Punnett square, producing the classic 9:3:3:1 phenotypic ratio through independent assortment.
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Biology - Co-dominance and Incomplete Dominance
Learn about co-dominance and incomplete dominance, two inheritance patterns where alleles don't follow simple dominant-recessive rules but instead share or blend traits.
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Biology - Sex-Linked Traits and X-Linked Inheritance
This video explains why X-linked traits like color blindness are more common in males than females due to differences in sex chromosomes and genetic inheritance patterns.
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Biology - Solving a Sex-Linked Punnett Square
This video explains why boys are more likely to be color blind using a Punnett square to show X-linked recessive inheritance patterns between a carrier mother and normal-vision father.
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Biology - How to Read a Pedigree Chart
Learn how to read pedigree charts to track genetic traits through families using symbols, lines, and Punnett squares to determine genotypes and inheritance patterns.
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Biology - How Environment Shapes Your Traits
This video explains how genotype and phenotype differ, showing how environment shapes traits through examples like Himalayan rabbits, twin astronauts, and seasonal butterflies.