Question

a single allele
a genotype consisting of two recessive alleles
a heterozygous trait
a genotype consisting of two dominant alleles
the three - base code in dna or messenger rna is called a
codon
translation
transfer rna
polymerase chain
meiosis produces in gametes
genetic variation

Explanation:

1. A heterozygous trait has two different alleles. The others describe single alleles or genotypes with two - same alleles.
2. A codon is a three - base code in DNA or messenger RNA. Translation is a process, transfer RNA is a type of RNA, and polymerase chain is related to PCR.
3. Meiosis produces genetic variation in gametes through processes like crossing - over and independent assortment.

Answer:

1. a heterozygous trait
2. codon
3. genetic variation