An ornithologist is studying beak depth in canaries by doing a number of field and laboratory experiments. He estimates

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An Ornithologist Is Studying Beak Depth In Canaries By Doing A Number Of Field And Laboratory Experiments He Estimates 1 (40.55 KiB) Viewed 481 times

An Ornithologist Is Studying Beak Depth In Canaries By Doing A Number Of Field And Laboratory Experiments He Estimates 2 (35.81 KiB) Viewed 481 times

An Ornithologist Is Studying Beak Depth In Canaries By Doing A Number Of Field And Laboratory Experiments He Estimates 3 (21.36 KiB) Viewed 481 times

An ornithologist is studying beak depth in canaries by doing a number of field and laboratory experiments. He estimates variance in beak depth in a field population as 4.84 mm. He also plots beak depth in offspring (reared by their biological parents in the field) as a function of beak depth of the biological parents. He conducts a cross-fostering experiment, where he places eggs in the nests of unrelated birds and measures beak depth in foster-chicks as a function of foster-parent beak depth. The results are shown in the figures below: Voelkundige bestudeer bekdiepte in kanaries deur 'n aantal veld en laboratorumeksperimente te doen. Hy bemum variansie in beldienen in veldpopulace s 4.84 mm. Hy pint bediepte van die nageslag wat deur hul biologiese ouers in die veld grootgemaak word as 'n funksie van die bediepte van die biologiese ouers Hy voer ook in knus-oannemingement or hy eers in diens van onverwante voels plaas en he diepte van aanneemkukers meet in funksie van die pleegnoms se bedieptes Dieneste word in die onderstaande figure o y=-0.15x+6.9 y=0.8x-0.01 6.2 5.8 5.4 5,4 6.2 5.4 5.8 Biological midparent 5.8 6.2 Foster midparent beak depth (mm) beak depth (mm) He also took a random sample of eggs from the field population and raised these chicks under strict standardised laboratory conditions, treating each egg and chick that hatched from the egn) exactly the same. The variance in beak depth in these laboratory reared canaries was 4.5 mm². Hy het ook 'n ekansie monster eiers uit die veldpopulimie genim en hierdie kuikens onder strengendere laboratoriumomondighede grootgemaak en elke mer en kukan feat uit die eersugsbron hit presies diede behandelievanin neidiepte in hierdie laboratorium geteelde kans 4.5mm Question 13 Complete Marked out of 1,0 What can be deduced from the data above? Wat kan afgelei word uit die don bo? a. Offspring resemble their biological parents, irrespective of a common environment. Nageslag lyk soos hul biologiese ouers, ongeag gemeenskape omgewing b. Offspring resemble their biological parents, because of a common environment. Nageslag soos hubiese ouers as gevolg van gemeenskap omgewing C Oc Offspring resemble their foster parents, despite of a common environment Nageslag lyk soos hul pleegouers ten spyte van 'n gemeegewing d. Offspring resemble their foster parents, because of a common environment. Nageslag lyk soos hul pleegouers as gevolg van in gemeenskaplike omgewing e Offspring do not resemble their biological parents because of a common environment Nageslag lyk nie soos hul biologiese ouers nie as gevilg van 'n gemee omgewing 1. Offspring do not resemble their foster parents because of a common environment. Nageslag lyk nie soos hul pleegouers nie, as gevolg van 'n gempomwing Midoffspring beak depth (mm) 6.2 5.8 5.4 Midoffspring beak depth (mm)
Question 14 Complete Marked out of 1.0 (...following from the previous) Thus..... (volg vanaf die vorige Dus... a. Phenotypic variance is explained mostly by heritable genetic differences between individuals, with a minor contribution made by differential rearing environments. Fenotipiese variansie word meestal verklaar deur oorerflike genetiese verskille tussen individue met 'e geringe bydrae van differensible grootmaakomgewings b. Phenotypic variance is explained by both differential rearing environments and heritable genetic differences between individuals making a more-or-less equal contribution. Fenotipiese variansie word verklaar deur differensicle grootmankomgewings en oorerfike genetiese verskille tussen individue wat min of meer gelyk bydroe Phenotypic variance is explained by heritable genetic differences between individuals only. Fenotiplese variansie word slegs verklaar deur oorerflike genetiese verskille tussen individue Ⓒd. Phenotypic variance is explained by differential rearing environments only. Fenotipiese variansie word verklaar deur slegs differensiele grootmaakomgewings e Phenotypic variance is explained mostly by differential rearing environments, with a minor contribution made by heritable genetic differences between individuals. Fenotipiese variansie word meestal verklaar deur differensiele grootmaalomgewings met geringe bydrae van oorerflike genetiese verskille tussen individue 1. Phenotypic variance is explained by homogenous rearing environments across all individuals and differences between genetic interactions between individuals. Fenotipiese variansie word verklaar deur homogene grootmaakomgewings en verskille tussen genetiese interaksie tussen individue Question 15 Complete Marked out of 2.0 What percentage of variation in beak depth is explained by environmental effects? (round to two decimals) Watter persentasie van variasie in bekdiepte word verklaar deur omgewings effekte? (rond tot twee desimale) Answer: 4.84
What is the additive genetic variance for beak depth in these canaries? (round to two decimals) Wat is die additiewe genetiese variansie vir bediepte in die konanies? (rond tot twee desimale) Answer: 7.02 Question 17 Complete Marked out of 2.0 Plants that have small seeds seem to be specifically susceptible to drought. During a drought season, only large seeded plants were available as food source and consequently the average beak depth of canaries surviving the drought, in the field, was 6.1 mm (before the population mean was 5.4 mm). What will the mean beak depth be of canaries in the following generation? (round to two decimals) Plante met klein sade veral vatbaar is vir droogte. Gedurende w droogteseisoen was slegs grootsoad plante beskikbaar as voedselbron en gevolg was die gemiddelde bekdiepte van kanaries wat die droogte oorleef het 6.1 mm (voorheen was die populasiegemiddelde 5.4 mm. Wat sal die gemiddelde bediepte von kanaries in die volgende generasie wees? (rond tot byee desimale) Answer: 6.05