Explain the trade-off betweennumber of offspring andamount of parental investmentper offspring.The trade-offs of parentingParental investment expenditure of timeand energy on one offspringPros: parental investment may inorease the chances ofan offspring to sunvive and reproducew net l eCons parental in vestmentreduces the parent's abilitybgenerate additional offspringParental investmentis a limitedresourceWhy do males and femaleshave different reproductivestrategies? Why do males inmany species employ anumber-of-offspring strategywhile females employ theparental investment strategy?Females are more likely to gain fromparental investment:Evolution of sexual reproduction1. The of tspring they care for have 100% ccarrying their genesDivergent selection that favored twoalternative reproductive strategies% chance of2. Their gain from multiple mates is limitedbetter tonvest in parenting than in mating1. Numberof-ofthoring sategy Individuabwhose gametes are good at fertilizing othergametes (smal, mobile, largenumber ofMale-biased operational sex-ratio the ratio ofsexually receptive males to sexually receptivefemales2 Parental investment strategy Individuabwhose gameles are good at developing aftarbeing fertiled (large invested in)What is an operational sexratio? Why is it male-biased inmany species?Since resources are limited, one cannot begood at both strategies.higher the tdividuasthe highar the naviduarsCompetition for matSeaction among matasBiased operational sea ratioTwo types of individuals, specializing in eachstrategysigher s activityLower s activityLower parantal investmantHigher parnta investmentSexual reproduotionDifferences in gamete sizeCS Scanned with CamScanner

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Explain the trade-off between number of offspring and amount of parental investment per offspring. The trade-offs of parenting Parental investment expenditure of time and energy on one offspring Pros: parental investment may inorease the chances of an offspring to survive and reproduce Cons: parental in vestmentreduces the parent's ability b generate additonal offspring Parental investment is a limitedresource

Explain the trade-off between number of offspring and amount of parental investment per offspring. The trade-offs of parenting Parental investment expenditure of time and energy on one offspring Pros: parental investment may inorease the chances of an offspring to survive and reproduce Cons: parental in vestmentreduces the parent's ability b generate additonal offspring Parental investment is a limitedresource

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter7: Development And Sex Determination

Section: Chapter Questions

Problem 5QP

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