Biology, 05.05.2020 04:12 rudyru7944
Phenotype is not often determined by one gene (i. e., metabolic rate is determined by the combination of multiple genes). In addition to an organism’s genotype, the environment can influence phenotype. A rabbit breeder has established that rabbit body weight is determined by the combination of three genes as well as ambient temperature during the first four weeks after birth. The three genes involved in the determination of body weight are gene A (fat deposition), gene B (appetite), and gene C (gastric motility). Each gene can occur in heavy and light alleles (indicated by upper case and lower case letters, respectively). If a rabbit is heterozygous for each gene (Aa, Bb, Cc), the rabbit is an intermediate weight. If a rabbit is homozygous for all of the light genes (aa, bb, cc), the rabbit is lightweight. If a rabbit is homozygous for all of the heavy genes (AA, BB, CC), the rabbit is heavyweight. Additionally, rabbits reared at low temperatures during early development will deposit additional fat, making them heavier, whereas rabbits reared at high temperatures will not deposit as much adipose tissue. Arrange the following genotype and ambient temperature combinations from heaviest to lightest weight rabbits.
Answers: 1
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Phenotype is not often determined by one gene (i. e., metabolic rate is determined by the combinatio...
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