1. Let’s see what you know! 23,000, microscope, nucleus, chromosomes, divide, DNA, proteins, code, genes __________

2. Reminder! What are chromosomes?

3. Human chromosomes. There are ____ pairs. For a total of ____ chromosomes

4. Homologous chromosome Duplicated chromosomes have the same _______. We often show them as an ____ shape.

5. This is a duplicated, homologous, chromosome pair Therefore, they have the same _________. Short arm p Long arm q

6. Label the parts of the chromosome

7. How did you do? duplicated

8. Time to play!

9. Chromosomes have genes

10. New Terms to know letters pp or PP are ALLELES. Each parent CONTRIBUTES one ALLELE to their offspring there are 2 ALLELES for each TRAIT, one from each parent alleles genes. genotype, think Genes When we look at the physical characteristics the genotype creates this is called a phenotype, think Physical. Purple, white flowers alleles Phenotype Purple flower Phenotype white flower Genotypes of 4 offspring are ?___ What is the phenotype of offspring?___