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Grade 12 Challenge: Biology by the Numbers Worksheet with Answers
Grade 12 (US) · Year 13 (UK) · Class 12 (India) · Science
Unit 5: Going FurtherReal-World ChallengesChallenge
Quantitative biology: carrier frequencies, multi-gene crosses, family genetics odds, population estimates and bacterial growth. This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.
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Practice Sheetaethelsystems.comChallenge: Biology by the Numbers
Grade 12 · Science
Name
Class
Date
Learning goal: Real-World Challenges
Directions: Read each question carefully and write your answer on the line.
In a micrograph at ×1500, a cell measures 36 mm. What is its actual size in µm, to 1 decimal place?
Answer: 24.0
- 1
A recessive genetic condition affects 1 in 1600 people. Using Hardy–Weinberg, what percentage of people are unaffected carriers? Give 1 decimal place.
- 2
A recessive genetic condition affects 1 in 3600 people. Using Hardy–Weinberg, what percentage of people are unaffected carriers? Give 1 decimal place.
- 3
A recessive genetic condition affects 1 in 10000 people. Using Hardy–Weinberg, what percentage of people are unaffected carriers? Give 1 decimal place.
- 4
Model a cell as a cube of side 10 µm. What is its surface-area-to-volume ratio (per µm)? Give an exact answer.
- 5
Genes assort independently. Parents AABB × AaBb have a child. What is the probability the child's genotype is exactly AaBB? Give a fraction.
- 6
A heart beats 80 times a minute, every minute, for 70 years (use 365.25 days a year). How many billion beats is that, to 1 decimal place?
- 7
In a micrograph at ×1500, a cell measures 24 mm. What is its actual size in µm, to 1 decimal place?
- 8
Two unaffected parents have a child with a recessive condition. Their second child is unaffected. What is the probability that this second child is a carrier? Give a fraction.
- 9
A heart beats 80 times a minute, every minute, for 80 years (use 365.25 days a year). How many billion beats is that, to 1 decimal place?
- 10
Model a cell as a cube of side 12 µm. What is its surface-area-to-volume ratio (per µm)? Give an exact answer.
- 11
A heart beats 70 times a minute, every minute, for 70 years (use 365.25 days a year). How many billion beats is that, to 1 decimal place?
- 12
Genes assort independently. Parents AaBbCC × AaBbCc have a child. What is the probability the child's genotype is exactly aaBbCC? Give a fraction.
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Free printable worksheets with answer keys · aethelsystems.com/worksheets/science/12/challenge_biology_world
Answer key — Challenge: Biology by the Numbers (Grade 12)
- 1.4.9%
- 2.3.3%
- 3.2.0%
- 4.3/5
- 5.1/4
- 6.2.9
- 7.16.0
- 8.2/3
- 9.3.4
- 10.1/2
- 11.2.6
- 12.1/16
Answer key (click to show)
- 1.4.9%
- 2.3.3%
- 3.2.0%
- 4.3/5
- 5.1/4
- 6.2.9
- 7.16.0
- 8.2/3
- 9.3.4
- 10.1/2
- 11.2.6
- 12.1/16
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