These may be dominant or recessive.

These may be dominant or recessive.

• A. Traits
• B. Genes
• C. Genomes
• D. Alleles

Answer: (D)

Alleles are the different forms a gene can take. Some alleles are dominant, others recessive, and the way these forms pair in an individual determines which trait is observed. In a heterozygous pairing, the dominant allele’s trait is expressed, masking the recessive one; only if both copies are the recessive allele does the recessive trait show. For example, a gene for a trait like seed color can have a dominant form that produces purple and a recessive form that produces white; as long as a dominant allele is present, the dominant trait appears. Traits are what you can see, genes are the units that carry the instructions, and genomes are the full genetic set. The statement about being dominant or recessive points to alleles.

Alleles are the different forms a gene can take. Some alleles are dominant, others recessive, and the way these forms pair in an individual determines which trait is observed. In a heterozygous pairing, the dominant allele’s trait is expressed, masking the recessive one; only if both copies are the recessive allele does the recessive trait show. For example, a gene for a trait like seed color can have a dominant form that produces purple and a recessive form that produces white; as long as a dominant allele is present, the dominant trait appears. Traits are what you can see, genes are the units that carry the instructions, and genomes are the full genetic set. The statement about being dominant or recessive points to alleles.