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Edexcel A-Level Biology AS 4.17 Measuring Biodiversity and Heterozygosity Questions

Measure biodiversity by recording species richness and abundance, then calculate heterozygosity index and population counts from genetic data.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • describe biodiversity surveys by counting species richness and abundance in a defined habitat
  • calculate heterozygosity index from heterozygotes divided by total population size
  • rearrange heterozygosity data to find the number of heterozygotes in a population

Edexcel A-Level Biology AS 4.17 Measuring Biodiversity and Heterozygosity Questions question 1

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The photograph shows a mother and baby Malayan tapir (Tapirus indicus). They live in the rainforests of southeast Asia. Each gamete of a Malayan tapir contains 26 chromosomes.

Figure for Question Edexcel A-Level Biology AS 4.17 Measuring Biodiversity and Heterozygosity Questions question 1 — Edexcel A-Level Biology AS

© Sipa US / Alamy Stock Photo

Biodiversity within a species can be measured using genetic diversity. Three melanistic Malayan tapirs have been discovered that have black fur all over their bodies. Melanistic tapirs have two copies of the recessive allele for fur colour and are homozygous.

Scientists wanted to determine the heterozygosity index of the Malayan tapir species. Which equation can be used to calculate the heterozygosity index? □ A □ B C

Table for Question Edexcel A-Level Biology AS 4.17 Measuring Biodiversity and Heterozygosity Questions question 1 — Edexcel A-Level Biology AS
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