He was known as “Father of Genetics”He discovered how traits were inheritedGenetics: it is the study of heredityHeredity: the passing over traits from parent to offspring
Mendel did his study on pea plantsPea plants have many traits(tall/short, purple flowers/ white flowers)Pea plants can be self- fertilised or cross fertilised
1. True-breeding: These plants always create plants that look like themselves2. Hybrid: Offspring of true- breeding plants Tall x short= Hybrid
Some traits are dominant over othersTall x Short= all tall offspring(hybrid)Tall is the dominant traitShort is recessive
Mendel discovered that each trait is controlled by two factors (alleles)Genotype: what genes, letters, the organism has(TT, Tt,tt)Phenotype: what it looks like (tall or short)Genes: factors that determine your trait
Explaining the crossWhen a parent makes sperm or egg, their genes separate (principle of segregation)The gametes (egg or sperm) contain either a T allele (tall) or t allele.
1. A one eyed purple people eater is crossed with a two eyes. Which one is dominant?2. If you use the letter E for this gene. What is the offspring?
3. Are these offspring the f1 or f2 generation?4. If you crossed the offspring with each other, how many of the new offspring would you expect to have two eyes?