2. Genetics: Phenotype and Genotype By Table 6

3. What is a Phenotype? is any observable characteristic or trait of an organism traitorganism traitorganism Phenotypes result from as well as the mixture of genes and the product of it.

4. In Mendelian genetics the dominant trait is the phenotype and in this example it is the big B in Bb To better understand it…

5. What is a genotype? The genotype is the genetic constitution of the dominant and resistant (i.e. the specific allele makeup of the individual) usually with reference to a specific character under consideration geneticallele geneticallele Science Vocabulary! Allele- ( from the greek word allelos meaning each other) is one of two or more forms of the DNA sequence of a particular gene.one of two or more forms of the DNA sequence of a particular gene. Homozygous- having 2 identical alleles of a particular gene Heterozygous (a.k.a. hybrids)- having 2 different alleles of a particular gene

6. In a few words it is… Genotype is the inherited gene combination It is like a message in the genes Genetic make-up of an organism

7. So do we now know how to differentiate Phenotype and Genotype?

9. Geno or Pheno? The flowers are purple OR OR Phenotype Genotype

10. Geno or Pheno? Genetic Code: Pp Or Or Genotype Phenotype

11. Let’s make it a little harder… If Katniss’ genetic code is Gb, that would mean the phenotype would be ________ If Katniss’ genetic code is Gb, that would mean the phenotype would be ________ Legend: B is for blue eyes G is for grey eyes Grey Eyes Grey Eyes Blue Eyes Blue-Grey Eyes Blue-Grey Eyes

12. If Peeta’s genetic code is BB that would mean the phenotype would be ________ Legend: B is for blue eyes G is for grey eyes Blue Eyes Blue-Grey Eyes Blue-Grey Eyes Grey Eyes

13. The HARD questions Josh is homozygous for night blindness. What is his genotype? ___________ Scarlet is heterozygous for night blindness. What is her genotype?____________ Is she night blind?___________. Scarlet is heterozygous for night blindness. What is her genotype?____________ Is she night blind?___________.

14. Well Done! Remember the differences between phenotype and genotype.

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