Question

in a group of cows, some individuals have horns and others do not. in this group, the gene for the horns trait has two alleles. the allele h is for not having horns, and the allele h is for having horns. earl, a cow from this group, has horns. earl has two alleles for having horns. based on this information, click the blue words to correct any errors in the text. earl is heterozygous for the horns gene. earl’s phenotype for the horns gene is hh. earl has horns. this is earl’s genotype for the horns trait.

Explanation:

1. For "Earl is heterozygous for the horns gene": Heterozygous means having two different alleles (e.g., Hh). But Earl has two alleles for having horns (hh), so he is homozygous recessive. So "heterozygous" should be replaced with "homozygous".
2. For "Earl’s phenotype for the horns gene is hh": Phenotype is the observable trait (like having horns), while genotype is the genetic makeup (like hh). So "phenotype" should be replaced with "genotype".
3. For "Earl has horns. This is Earl's genotype for the horns trait": Genotype is the genetic makeup (e.g., hh), and phenotype is the observable trait (having horns). So "genotype" should be replaced with "phenotype".

Answer:

• Replace "heterozygous" with "homozygous".
• Replace "phenotype" with "genotype".
• Replace "genotype" with "phenotype".