Gce Model Questions Vol1 2017 Biology Question 16

Practice objective / multiple choice question 16 from the 2017 Gce Model Questions Vol1 Biology examination.

Gce Model Questions Vol1 2017 Biology Objective / Multiple Choice Medium Difficulty
Question 16 GCE_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • objective

A beetle species has a per‑generation nucleotide mutation rate of \(2\times10^{-8}\) per base pair. Its haploid genome size is \(1.2\times10^{9}\) bp. The average generation time is 0.5 year. Assuming mutations accumulate linearly, estimate the average number of nucleotide differences expected between two individuals that diverged 5 million years ago. If a related species has a generation time of 1 year but the same mutation rate, how many times more nucleotide differences would you expect between two individuals of that species that also diverged 5 million years ago?

Answer Options

A. Approximately \(4.8\times10^{8}\) nucleotide differences; the species with a 1‑year generation time would have the same number, i.e. the ratio is 1.
Correct Answer B. Approximately \(4.8\times10^{8}\) nucleotide differences; the species with a 1‑year generation time would have half as many, i.e. the first species has twice as many differences (ratio = 2).
C. Approximately \(2.4\times10^{8}\) nucleotide differences; the species with a 1‑year generation time would have twice as many, i.e. the first species has half as many differences (ratio = 0.5).
D. Approximately \(4.8\times10^{9}\) nucleotide differences; the species with a 1‑year generation time would have half as many, i.e. the first species has twice as many differences (ratio = 2).
Correct Answer
B
Correct Option:
Approximately \(4.8\times10^{8}\) nucleotide differences; the species with a 1‑year generation time would have half as many, i.e. the first species has twice as many differences (ratio = 2).

About This Question

This is Gce Model Questions Vol1 2017 Biology Question 16. It is one of the objective questions from the 2017 Gce Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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