(picture of pairs of nucleotide bases making up the rungs of the DNA ladder like that in atlas)
(picture of banded chromosome 19 similar to that in tactile atlas)
(picture of a pair of chromosomes, each with the locus
(picture of pairs of nucleotide bases making up the rungs of the DNA ladder like that in atlas)
(picture of banded chromosome 19 similar to that in tactile atlas)
(picture of a pair of chromosomes, each with the locus of the “flower color gene” labeled. One chromosome contains a gene for purple flowers, the other a gene for white flowers, so this individual plant is “heterozygous” for flower color.
*Punnett’s square is a square or rectangle divided into 4 quadrants with one parents genotype written above the left and right quadrants – for instance Br above the left side and bl above the right side if Mom had brown eyes but we knew she carried a blue gene too. The other parent’s genotype is recorded outside the square on the left, next to the upper and lower quadrants. E.g. maybe Dad has 2 blue genes. By looking at the genetic contributions possible from each parent, each quadrant within the square can be filled in
with the possible genotypes of any offspring of the couple. For example the upper left quadrant (just under the label in