Introduction To Genetics And Evolution Coursera Quiz Answers 📢

This week moves from chromosomes to inheritance patterns. You will solve Punnett squares and pedigree analysis.

This is where Mendelian genetics gets complicated. Genes on the same chromosome don’t always assort independently.

You can find more information on these topics through these resources:

Feel free to ask if you have any questions or if there's anything else I can help you with. introduction to genetics and evolution coursera quiz answers

Q1: In pea plants, purple flowers (P) are dominant to white (p). A homozygous dominant plant is crossed with a white-flowered plant. What percentage of the F1 offspring will be purple?

Answer: D (100%) Explanation: PP x pp = all Pp heterozygotes. Since P is dominant, all show purple.

Q2: In a test cross, an individual with a dominant phenotype (but unknown genotype) is crossed with a: This week moves from chromosomes to inheritance patterns

Answer: C (Homozygous recessive) Explanation: Crossing with a recessive (e.g., pp) reveals the unknown's genotype. If any offspring show the recessive trait, the unknown was heterozygous.

Q3: A man with type AB blood and a woman with type O blood have a child. What is the probability the child has type B blood?

Answer: C (50%) Explanation: AB genotype = I^A I^B. O genotype = ii. Possible offspring: I^A i (Type A) or I^B i (Type B). 50/50. Feel free to ask if you have any

Q4: X-linked recessive disorders (like hemophilia) are more common in males because:

Answer: B Explanation: Males are hemizygous for X genes. They lack a second X to mask a recessive mutation.

Q5: What is the expected phenotypic ratio from a dihybrid cross (RrYy x RrYy) assuming independent assortment?

Answer: C (9:3:3:1) Explanation: 9 round yellow, 3 round green, 3 wrinkled yellow, 1 wrinkled green.

This is where students often stumble. We move beyond simple dominance to epistasis, polygenic traits, and gene linkage.