1. Natural Selection of Strawfish

2. Phenotypes & Genotypes
Phenotypes are controlled by genotype

3. Phenotype is Selected
Natural selection acts on phenotype

4. Gene Pool is Affected
Natural selection changes allele frequency

5. Behind the scenes FISH B G Y Tot Gen 1 3 9 Gen 2 1 7 ALLELES B Y Tot18
Gen 2 5 14
What happened to the frequency of the yellow allele?
ALLELE Frequency B Y
Tot
Gen 1 .5
1.0
Gen 2 .6 .4
Will yellow fish be born as often? Will the yellow allele disappear?

6. Is a gene a fish’s way of making more fish?
Any QUESTIONS??
Is a gene a fish’s way of making more fish?
or… Is a fish a gene’s way of making more genes?