1. Heredity: 5.2

2. Heredity: Determining Inheritance 5.2
To study the inheritance of a trait, a _______________ experiment is conducted.
A typical experiment consists of a series of
mating or ___________.
crossbreeding
crosses
Breeding hybrids to create something unique
Selective Breeding for a bigger or smaller dog

3. When the genotype of an organism contains 2 identical alleles for a trait, it is called a _____________ genotype.
There are two kinds of ______________ genotypes:
LL = __________________ (2 dominant alleles)
ll = ____________________ (2 recessive alleles)
homozygous
homozygous
Homozygous dominant
Homozygous recessive

4. When the genotype of an organism contains 2 different alleles for a trait, it is called a _____________ genotype.
There is only 1 kind of ___________ genotype.
Ll = ______________ (1 dominant and 1 recessive allele)
heterozygous
heterozygous
heterozygous

5. 4. Example of crossbreeding with garden pea flower color
Generation
_____
Cross-pollinate 2 organisms that are _____________for different forms of flower color. LL ll
homozygous P Ll Ll Ll Ll
All offspring have _____________ genotypes and ________ phenotypes.
heterozygous F1 Ll
purple Ll LL Ll Ll ll
This generation produces all possible genotype combinations and both phenotypes appear. F2 LL Ll Ll ll

6. Try 2 & 3 on your own. Raise your hand for help!
Parents: ______ X _______
Offspring: _____ _____ _____ _____
2. Parents: ______ X _______
3. Parents: ______ X _______ LL ll Ll Ll Ll Ll Ll ll Ll Ll

7. Try 4 on your own. Raise your hand for help!
The allele H and h control the inheritance of height in pea plants.
If a cross between a short plant and a tall plant
produces only offspring that are tall:
Which is the dominant allele? ______ Letter? _____
Which is the recessive allele? ______ Letter? _____
tall H
short h