Genetics Practice Problems s3

Genetics Practice Problems 1. For each genotype, indicate whether it is heterozygous (HE) or homozygous (HO) AA ____ Ee ____ Ii ____ Mm ____ Bb ____ ff ____ Jj ____ nn ____ Cc ____ GG ____ kk ____ OO ____ Dd ____ HH ____ Ll ____ Pp ____ 2. For each of the genotypes below, determine the phenotype. Purple flowers are dominant to white flowers Brown eyes are dominant to blue eyes PP ______BB ______Pp ______Bb ______pp ______bb ______

Round seeds are dominant to wrinkled Bobtails are recessive (long tails dominant) RR ______TT ______Rr ______Tt ______rr ______tt ______3. For each phenotype, list the genotypes. (Remember to use the letter of the dominant trait) Straight hair is dominant to curly. Pointed heads are dominant to round heads. ______straight ______pointed ______straight ______pointed ______curly ______round 4. Set up the Punnett square for each of the crosses listed below. The trait being studied is round seeds (dominant) and wrinkled seeds (recessive) Rr x rr

Rr x Rr

RR x Rr

Practice with Crosses. Show all work! 5. A TT (tall) plant is crossed with a tt (short plant). 6. Tt plant is crossed with a Tt plant.

7. A heterozygous round seeded plant (Rr) is crossed with a homozygous round seeded plant (RR).

8. Colorblindness is sex-linked recessive disorder. A colorblind woman marries a normal visioned man. What are the chances that their sons will be colorblind?

Review: Topic: Meiosis & Genetics 1. The exchange of segments of chromatids during synapsis is called ______. 2. Which process is depicted below?

3. Chromosomes that contain genes for the same characteristic are considered ______. Now restate this concept in the line below in a different way:

______

4. Which basic genetic concept states that chromosomes are distributed to gametes in a random fashion? Restate the question.

5. Diploid cells contain how many chromosomes? Is this full set? Explain.

Topic: Protein Synthesis 6. DNA Strand: ATT TAA CGC GGC AAA UUU mRNA Strand: tRNA Strand:

7a. Where is DNA located in prokaryotes? 7b. Where is mRNA located (multiple places) in eukaryotes? 7c. Where is tRNA located in eukaryotes? 7d. What are monomers of DNA? 7e. What are monomers of protein (polypeptide chains)?