Two scientists do not agree on which type of grocery bag is better for the environment

Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.

What are genotypes? what are phenotypes?

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.