While studying gull egg laying abilities a researcher noted that the birds laid an average of 7 - 9 eggs per clutch at the beginning of the study. After studying the population for 15 generations the researcher noted that the birds now laid an average of 3- 4 eggs per clutch. What type of natural selection is occurring in the population of gulls? rev: 12_12_2013_QC_42519
A) stabilizing
B) directional
C) disruptive
D) There is no selection occurring in this population.

Question

Quizplus · Accepted Answer

Directional selection is occurring because the average number of eggs laid per clutch has shifted in one direction, from 7-9 eggs to 3-4 eggs, indicating that traits for laying fewer eggs are being favored over time.

While Studying Gull Egg Laying Abilities a Researcher Noted That