1. What controls traits?
Chapter 5 Lesson 2

2. Alleles Genes Chromosomes
Allele- the different forms of a gene
Gene- section of a chromosome that has genetic information for one trait.
Chromosomes- your chromosomes exist as pairs, one from each parent.

3. Phenotype- how a trait appears or shows
Phenotype- how a trait appears or shows. What are some phenotypes from the picture? Genotype- two alleles that control the phenotype of a trait. What can we infer about the genotype of the cat if white fur is dominant?

4. Possible symbols for Cat’s GenotypeWW Ww

5. Symbols cont.
Homozygous- when two alleles of a gene are the same, its genotype.
Heterozygous- if the two alleles of a gene are different.
Label the following as homozygous or heterozygous WW Ww ww

6. Guided Practice Label each as genotype or phenotype
black BB
polkadot
red gg Gg

7. Label each of the following as homozygous or heterozygousTT Bb bb Hh HH nn

8. If purple (P) is dominant to white (p) tell whether each of the following is purple or white and homozygous or heterozygous. PP Pp pp