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2) An investigation of yellow croaker tail fin length showed that the length of fins varied from 36mm to 81mm. In one generation recorded out of a population of 3,980 fish only three had fins as long as 81mm. a) i) How many genes and ii) how many alleles are likely to be involved in the determination of this quantitative trait? and iii) what is the contribution of each dominant allele to the fin length? In one cross between fish both with 59 mm fins it was found that the offspring all b) had fins between 58 and 60 mm long. However, when the cross was repeated with another

2) An investigation of yellow croaker tail fin length showed that the length of fins varied from 36mm to 81mm. In one generation recorded out of a population of 3,980 fish only three had fins as long as 81mm. a) i) How many genes and ii) how many alleles are likely to be involved in the determination of this quantitative trait? and iii) what is the contribution of each dominant allele to the fin length? In one cross between fish both with 59 mm fins it was found that the offspring all b) had fins between 58 and 60 mm long. However, when the cross was repeated with another

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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2) An investigation of yellow croaker tail fin length showed that the length of fins varied from 36mm to 81mm. In one generation recorded out of a population of 3,980 fish only three had fins as long as 81mm. i) How many genes and ii) how many alleles are likely to be involved in the determination of this quantitative trait? and iii) what is the contribution of each dominant allele to the fin length? a) In one cross between fish both with 59 mm fins it was found that the offspring all b) had fins between 58 and 60 mm long. However, when the cross was repeated with another pair of 59mm fish\, this time the offspring tails varied between 36 and 81 mm long. Specify possible parental genotypes for the fish used in; i) the first cross and, ii) the second cross. In another cross a new true-breeding fish variety was used which gave a range of c) F, tail fin lengths that had a variance of 0.431. In the crosses using the original variety there was an even greater range of fin lengths and a variance of 0.786. What can you conclude about the heritability (H) of tail length in the original fish?
Transcribed Image Text:2) An investigation of yellow croaker tail fin length showed that the length of fins varied from 36mm to 81mm. In one generation recorded out of a population of 3,980 fish only three had fins as long as 81mm. i) How many genes and ii) how many alleles are likely to be involved in the determination of this quantitative trait? and iii) what is the contribution of each dominant allele to the fin length? a) In one cross between fish both with 59 mm fins it was found that the offspring all b) had fins between 58 and 60 mm long. However, when the cross was repeated with another pair of 59mm fish\, this time the offspring tails varied between 36 and 81 mm long. Specify possible parental genotypes for the fish used in; i) the first cross and, ii) the second cross. In another cross a new true-breeding fish variety was used which gave a range of c) F, tail fin lengths that had a variance of 0.431. In the crosses using the original variety there was an even greater range of fin lengths and a variance of 0.786. What can you conclude about the heritability (H) of tail length in the original fish?
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