Questions: QUESTION 5 What can be said about an animal that has the genotype BB? Select all that apply. They have two recessive variants of the gene. 100% of their offspring will inherit the dominant form of the gene. They are homozygous for this gene. The phenotype will be the trait associated with the recessive allele. QUESTION 6 What term describes an allele that is displayed phenotypically only if an individual has two copies of the allele? heterozygous recessive dominant homozygous

Let's address each question one by one.

What can be said about an animal that has the genotype BB? Select all that apply.

1. They have two recessive variants of the gene.

   • This statement is incorrect. The genotype BB indicates that the animal has two dominant alleles, not recessive ones.

2. $100 \%$ of their offspring will inherit the dominant form of the gene.

   • This statement is incorrect. While the animal with genotype BB will always pass on a dominant B allele to its offspring, the other parent’s genotype will also influence the offspring's genotype. Therefore, we cannot guarantee that 100% of the offspring will inherit the dominant form of the gene unless the other parent is also BB.

3. They are homozygous for this gene.

   • This statement is correct. The genotype BB means that the animal has two identical alleles for this gene, making it homozygous.

4. The phenotype will be the trait associated with the recessive allele.

   • This statement is incorrect. Since the animal has two dominant alleles (BB), the phenotype will be the trait associated with the dominant allele, not the recessive one.

Summary for QUESTION 5: The correct statement is: They are homozygous for this gene.

What term describes an allele that is displayed phenotypically only if an individual has two copies of the allele?

• heterozygous

  • This term refers to having two different alleles for a gene, one dominant and one recessive. It does not describe an allele that is displayed phenotypically only if an individual has two copies of it.

• recessive

  • This is the correct term. A recessive allele is only displayed phenotypically if an individual has two copies of the allele.

• dominant

  • This term refers to an allele that is displayed phenotypically even if only one copy is present. It does not fit the description given in the question.

• homozygous

  • This term refers to having two identical alleles for a gene, but it does not specifically describe the nature of the allele's phenotypic expression.

Summary for QUESTION 6: The correct term is: recessive.

In summary:

• For QUESTION 5: They are homozygous for this gene.
• For QUESTION 6: The correct term is recessive.