Directions: Use the Hardy-Weinberg equation to calculate the predicted genotype frequencies for each population scenario below. Place your calculations and data in the spaces provided. Once you have calculated the frequencies, answer the corresponding conclusion questions. After completing all three scenarios, analyze your responses to each and answer the final conclusion question. You must show all your calculations to receive credit. Scenario #1 Easter Island is a small island in the southern Pacific Ocean. It lies approximately 3,500 kilometers east of Chile and is considered one of the most remote islands. It is also a volcanic island. In 2025, Easter Island had a population of 16,000. However, many of the island’s residents were killed during a series of volcanic eruptions that occurred in the year 2065. Of the original population, only 200 people survived. It is now 100 years later, and the population of Easter Island has reached 800. Of the current population, 328 people are homozygous recessive for Marfan syndrome, which is autosomal (mm genotype). Marfan syndrome is a genetic disorder that affects the connective tissue. Symptoms of Marfan syndrome include increased height, thinness, flexible joints, heart complications, and long arms, legs, fingers, and toes. q2 – q – p – p2 – 2pq – Conclusion Questions Use this information to help you answer the following questions: The original population’s actual genotype frequencies were: MM – 0.42, Mm – 0.13, mm – 0.45. 1. Is the current population in Hardy-Weinberg equilibrium? Yes or No 2. Is the current population evolving? Yes or No 3. If the current population is evolving, what type of effect is responsible for genetic drift?
Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
Directions: Use the Hardy-Weinberg equation to calculate the predicted genotype frequencies for each
population scenario below. Place your calculations and data in the spaces provided.
Once you have calculated the frequencies, answer the corresponding conclusion questions. After completing all
three scenarios, analyze your responses to each and answer the final conclusion question. You must show all your
calculations to receive credit.
Scenario #1
Easter Island is a small island in the southern Pacific Ocean. It lies approximately 3,500 kilometers east of
Chile and is considered one of the most remote islands. It is also a volcanic island. In 2025, Easter Island
had a population of 16,000. However, many of the island’s residents were killed during a series of volcanic
eruptions that occurred in the year 2065.
Of the original population, only 200 people survived. It is now 100 years later, and the population of Easter
Island has reached 800. Of the current population, 328 people are homozygous recessive for Marfan
syndrome, which is autosomal (mm genotype). Marfan syndrome is a genetic disorder that affects the
connective tissue. Symptoms of Marfan syndrome include increased height, thinness, flexible joints, heart
complications, and long arms, legs, fingers, and toes.
q2 –
q –
p –
p2 –
2pq –
Conclusion Questions
Use this information to help you answer the following questions:
The original population’s actual genotype frequencies were: MM – 0.42, Mm – 0.13, mm – 0.45.
1. Is the current population in Hardy-Weinberg equilibrium? Yes or No
2. Is the current population evolving? Yes or No
3. If the current population is evolving, what type of effect is responsible for genetic drift?
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