Genotype and Phenotype

Genotype and Phenotype

​Genotype vs Phenotype

​https://www.youtube.com/watch?v=lYAHx7NiF3g

genotype = genetic makeup

phenotype = physical appearance or visible traits

Genotype

• The gene combination for a trait, represented by a combination of alleles

• For example Tt, tt, TT

• You CANNOT see and organism's genotype

Multiple Choice

If you look carefully, you can see an organism's genotype

• true

• false

Multiple Choice

Which of the following correctly describes GENOTYPE?

• A. The combination of genes an organism has

• B. The physical traits an organism demonstrates

Phenotype

• Organism's physical appearance or its visible traits

• For example the flowers of pea plants can be either purple or white

• You CAN see on organism's phenotype

Multiple Select

Which of the following are examples of phenotypes for pea plants? (choose all correct answers)

• purple flowers

• PP

• green seeds

• tall stems

• tt

Multiple Select

Which of the following are examples of phenotypes for people? (choose all correct answers)

• brown eyes

• freckles

• BB

• Ff

• hitchhicker's thumb

Multiple Choice

Which of the following correctly describes PHENOTYPE?

• A. The combination of genes an organism has

• B. The physical traits an organism demonstrates

Homozygous

• -When the two alleles of a gene are EXACTLY the same

• -Homozygous dominant has two CAPITAL letters. (TT, FF, RR, PP)

• -Homozygous recessive has two lowercase letters. (tt, ff, rr, pp)

Heterozygous

• -When the two alleles of a gene are different, one dominant and one recessive

• -One capital, one lowercase

• Tt, Ff, Rr, Pp

homozygous vs heterozygous

• 2 dominant alleles = homozygous dominant AA

• 2 recessive alleles = homozygous recessive bb

• 1 dominant & 1 recessive allele = heterozygous Cc

Multiple Select

Choose ALL examples of HETEROZYGOUS genotypes

• Tt

• tt

• RR

• Hh

• Bb

Multiple Select

Choose ALL examples of HOMOZYGOUS genotypes.

• TT

• hh

• Rr

• bb

• Hh

Multiple Choice

Which of the following means an organism has two of the SAME alleles?

• A. Homozygous

• B. Heterozygous

Multiple Choice

What does HETEROZYGOUS mean?

• Two of the SAME allele

• Two DIFFERENT alleles

Multiple Choice

Which of the following describes the Genotype AA?

• A. Homozygous

• B. Heterozygous

Multiple Choice

Which of the following describes the Genotype aa?

• A. Homozygous

• B. Heterozygous

Multiple Choice

Which of the following describes the Genotype Aa?

• A. Homozygous

• B. Heterozygous

Multiple Choice

Which of the following genotypes is HETEROZYGOUS

• A. TT

• B. Tt

• C. tt