Question

r.3 genetics vocabulary: genotype and phenotype nrk in a group of labrador retrievers, some individuals have black fur and others have brown fur. in this group, the gene for the fur color trait has two alleles. the allele f is for black fur, and the allele f is for brown fur. lassie, a labrador retriever from this group, has brown fur. lassie has two alleles for brown fur. based on this information, click the blue words to correct any errors in the text. lassie is heterozygous for the fur color gene. lassies genotype for the fur color trait is black fur. lassies phenotype for the fur color gene is ff.

Explanation:

1. For "Lassie is heterozygous for the fur color gene": Heterozygous means having two different alleles (e.g., Ff). But Lassie has two alleles for brown fur, so she should be homozygous recessive (ff). So "heterozygous" should be changed to "homozygous".
2. For "Lassie's genotype for the fur color trait is black fur": Genotype refers to the genetic makeup (allele combination), while "black fur" is a phenotype (physical trait). Since Lassie has brown fur and two alleles for brown fur, her genotype should be "ff" (or described as having two f alleles), not "black fur". Also, the phenotype here was mislabeled as genotype. So "black fur" (as a genotype description) is wrong; the correct genotype - related term here would be something like "ff" or "homozygous recessive" (but in the context of the correction, since it's a vocabulary mix - up, we correct the term: "genotype" here was misused with a phenotype term, and the actual genotype for brown fur with two f alleles is "ff", but in the text's correction, we change "black fur" (wrong genotype description) to "ff" (or recognize the error in the term type: genotype vs phenotype). Wait, more accurately, the sentence has a mix - up: genotype is about alleles, phenotype is about the trait. So "black fur" is a phenotype, so the correct genotype for Lassie (brown fur, two f alleles) is "ff", so we change "black fur" to "ff" (or if we are correcting the term type, since it's a genotype statement, we need to use a genotype - related description. But given the context, Lassie has two f alleles, so her genotype is ff. So "black fur" (phenotype) is wrong in a genotype statement, so we change it to "ff".
3. For "Lassie's phenotype for the fur color gene is FF": Phenotype is the physical trait (brown fur), and "FF" is a genotype (homozygous dominant, which would give black fur). Lassie has brown fur, so her phenotype is "brown fur", and her genotype is "ff". So we change "FF" to "brown fur" (since phenotype is the trait, and "FF" is a genotype).

Answer:

1. "heterozygous" should be changed to "homozygous".
2. "black fur" (in the genotype statement) should be changed to "ff" (or a description of the genotype with two f alleles, but most accurately "ff" as the genotype for two brown - fur alleles).
3. "FF" (in the phenotype statement) should be changed to "brown fur".