LAB 05 EXERCISE 05

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East Los Angeles College *

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Biology

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Apr 3, 2024

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LAB 03 EXERCISE 05 Due No due date Points 5 Questions 5 Time Limit None Attempt History Attempt Time Score LATEST Attempt 1 3 minutes 5outof 5 Score for this quiz: 5 out of 5 Submitted Feb 21 at 10:52am This attempt took 3 minutes. Question 1 Not yet graded / 1 pts (Q001) While most human traits are polygenic, the traits in the chart on p. 72 of your lab manual have traditionally been considered Mendelian traits. More recent research has disputed the single-gene nature of some of these traits, but for the purpose of this exercise, assume that the traits discussed in this exercise are Mendelian. Work to determine your own phenotypes and possible genotypes for these traits. (Note: Refer to the table on p. 62 of your lab manual for images of these traits.) A "cleft chin" is a chin with a slight indentation in the middle. A cleft chin is a dominant trait. What is your phenotype and possible genotype(s) for cleft chin? Your Answer: Phenotypes include smooth, slightly cleft, and cleft chins. Genotypes: Cc-50%, CC-25%, and CC-25%. Question 2 Not yet graded / 1 pts (Q002) Freckles are a dominant trait. What is your phenotype and possible genotype(s) for freckles? Your Answer: Phenotypes: Freckles, Some freckles, No freckles Genotype: FF- 25%, Ff-50%, ff- 25%

Question 3 Not yet graded / 1 pts (Q003) "Attached earlobes" are earlobes that are fully attached to the side of the head, unlike unattached earlobes, which have a lower section that hangs freely away from the side of the head. Attached earlobes are a recessive trait. What is your phenotype and possible genotype(s) for attached earlobes? Your Answer: Characteristics: Detachable, Detachable, Attached Types of DNA: UU-25%, UU-50%, and uU-25% Question 4 Not yet graded / 1 pts (Q004) A "hitchhiker's thumb" is a thumb that bends backwards when fully extended from a hand that is closed in a fist. Hitchhiker's thumb is a recessive trait. What is your phenotype and possible genotype(s) for hitchhiker's thumb? Your Answer: Phenotypes: Hitchhiker, straight, and straight Genotype: 25 % SS, 50 % Ss, 25 % ss Question 5 Not yet graded / 1 pts (Q005) A "widow's peak" is a hairline that dips down in the middle of the forehead to form a V-shape, unlike a non-widow's-peak hairline, which runs horizontally straight along the forehead. A widow's peak is a dominant trait. What is your phenotype and possible genotype(s) for widow's peak? Your Answer: Phenotypes: Widow's peak, Widow's peak, straight Genotypes: WW-25%, Ww-50%, ww-25% Quiz Score: 5 out of 5 This quiz score has been manually adjusted by +5.0 points.

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LAB 05 EXERCISE 05

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