Which term denotes a haploid cell capable of fusion?

• A. Diploid
• B. Gamete
• C. Chromosome
• D. Allele

Answer: (B)

The idea being tested is the type of cell that participates in sexual fusion. A gamete is a haploid reproductive cell that fuses with another gamete during fertilization. Because gametes carry a single set of chromosomes, their union restores the full diploid chromosome number in the resulting zygote. Other terms don’t describe this combination of being haploid and capable of fusion: a diploid cell has two chromosome sets, a chromosome is simply the structure carrying genes, and an allele is a version of a gene.