What are the functions of the horns on a tarantula?

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii