A botanist studying waterlilies in an isolated pond observed three leaf shapes i

Question

A botanist studying waterlilies in an isolated pond observed three leaf shapes in the population: round, arrowhead, and scalloped.

Marker analysis of DNA from 175 individuals showed the round-leafed plants to be homozygous for allele r1, while the plants with arrowhead leaves were homozygous for a different allele at the same locus, r2. Plants with scalloped leaves showed DNA profiles with both the r1 and r2 markers. Frequency of the r1 marker was estimated at 0.78.The botanist also counted 20 plants with scalloped leaves in the pond.

What is the inbreeding coefficient F for this population? (Enter the value of F rounded to two decimal places. (Note: For your initial calculation of He , round that number to two decimal places.))

Explanation / Answer

To calculate inbreeding coefficient from population data, use the following equation:

F = (He - Ho)/He

Where He is the number of heterozygotes (2pq*number of individuals in the population) expected in the population and Ho is the number of observed heterozygotes in the population.

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