Normal leg size, characteristic of Kerry-type cattle, is produced by homozygous genotype DD. Short-legged Dexter-type cattle possess the heterozygous genotype Dd. The homozygous genotype dd is lethal producing grossly deformed stillbirths called “bulldog calves”. The presence of horns in cattle is governed by the recessive allele of another gene locus p, the polled condition (absence of horn) being produced by its dominant allele P. In matings between polled Dexter cattle genotype DdPp, a) what expected ratio is expected in the adult progeny? b) what percentage of the progeny will carry the lethal allele
Normal leg size, characteristic of Kerry-type cattle, is produced by homozygous genotype DD. Short-legged Dexter-type cattle possess the heterozygous genotype Dd. The homozygous genotype dd is lethal producing grossly deformed stillbirths called “bulldog calves”. The presence of horns in cattle is governed by the recessive allele of another gene locus p, the polled condition (absence of horn) being produced by its dominant allele P. In matings between polled Dexter cattle genotype DdPp, a) what expected ratio is expected in the adult progeny? b) what percentage of the progeny will carry the lethal allele
Human Biology (MindTap Course List)
11th Edition
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cecie Starr, Beverly McMillan
Chapter19: Introduction To Genetics
Section: Chapter Questions
Problem 9CT
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Normal leg size, characteristic of Kerry-type cattle, is produced by homozygous genotype DD. Short-legged Dexter-type cattle possess the heterozygous genotype Dd. The homozygous genotype dd is lethal producing grossly deformed stillbirths called “bulldog calves”. The presence of horns in cattle is governed by the recessive allele of another gene locus p, the polled condition (absence of horn) being produced by its dominant allele P. In matings between polled Dexter cattle genotype DdPp, a) what expected ratio is expected in the adult progeny? b) what percentage of the progeny will carry the lethal allele? (for your answer use the format ex. a) 1/6 dexter, polled : 3/6 dexter, non polled.....b) 6/7
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