Heredity. Chromosomes. We discussed earlier in this unit, the usage of karyotype charts Humans have 23 pairs of chromosomes 1 sex chromosome pair 22 autosome pairs Recall that males have one X and one Y, while females have two X’s
A square represents
A circle represents
A vertical line and a bracket connect the parents to their children.
A horizontal line connecting a male and a female represents a marriage.
A shaded circle or square indicates that a person expresses the trait.
A circle or square that is not shaded indicates that a person does not express the trait.