If two individuals that are heterozygous for the sickle cell allele (aa) mate with one another, what is the chance that their child will have sickle cell anemia ?

What feature of cell theory is best demonstrated in the image

Which of the following statements is true? a. there are more chromosomes in an organism than there are genes. b. there are more genes in an organism that there are chemical bases. c. dna is made of sugar, phosphate, and carbon. d. genes are found in specific locations on a chromosome.

1. fold your hands together so your thumbs cross over ,and look at your thumbs. which thumb feels most "comfortable" on top is actually controlled by a gene. the left thumb folding over the right thumb is a domi