![]() Which struggle to survive their first winter.ĭepending on how well argued: Females laying large clutches have shorter Survival post fledging, perhaps because larger clutches contain smaller chicks, Plausibly, large clutch size could be correlated with reduced offspring wing length, and shorter wings are strongly favoured. Genetically correlated with another trait under selection in the oppositeĭirection e.g. This could be because clutch size is strongly ROCK POCKET MOUSE ALLELE AND PHENOTYPE ANSWER KEY CODEThis implies there are no alleles that code forĪcting on clutch size. Is not heritable, and therefore evolution cannot occur even when there is ![]() Give two possible explanations for thisġ) Lack of genetic variation: clutch size However, the mean clutch size in this population has beenĬonstant for the last 30 years. ![]() Laying larger clutches always fledged more offspring than females that laid Mark for identifying natural selection as the main cause of evolution if theyĬhange, not specifying change at population level.ī) A study on a pied flycatcher population in Sweden found that females Population, typically in response to natural selection.Ģ marks for change, 2 for genetic change, 2įor identifying that it happens at the population or species level. And comments are intended to guide you in writing concise and well-focusedĪnswers that address the key points raised in each question.Ĭontacting the TA markers unless you feel a serious marking error has beenġ (Alan Brelsford) Question 2 (Pablo Trujillo) Question 3 (Sophie Boizard) ![]()
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