HIV can be transmitted via- choose all correct answers a) unprotected sex
b) sharing dirty needles
c) vaginal birth
d) sneezing

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.

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

If an organ has six haploid chromosomes,how many chromosomes are present. 6 12