Lect 1 - Genetic Crosses (Lecture)

WINTER Template 01 Genetic Crosses

WINTER Template 01What I need to know … • 2(k) Explain the terms locus, allele, dominant, recessive, codominant, incomplete dominance, homozygous, heterozygous, phenotype, genotype and sex linkage • 2(l) Explain how genes are inherited from one generation to the next via the germ cells or gametes • 2(n) Use genetic diagrams to solve problems in dihybrid crosses

Definitions 02 • Common understanding of the term • Allows scientists, researchers and doctors to be on the “same page” during discussions • Important in solving genetic crosses

Definitions 02 • 2011 STQ Paper

Definitions 02 • 2015 STQ Paper

Definitions 02 List of words • Locus • Allele (Dominant & Recessive) • Codominant • Incomplete dominant • Homozygous & Heterozygous • Phenotype • Genotype • Sex Linkage

Definitions 02 Locus (singular) • Loci (plural) • The fixed position on a particular chromosome that each gene occupies Pg.1

Definitions 02 Different genes occupy different gene loci Pg.1

Definitions 02 Pg.1

Definitions 02 List of words • Locus • Allele (Dominant & Recessive) • Homozygous & Heterozygous • Codominant • Incomplete dominant • Phenotype • Genotype • Sex Linkage ✓