With questions 25-27 (on number 27 the last answer is “d. 20 degrees”)

Suppose a man is heterozygous for heterochromia, an autosomal dominant disorder which causes two different‑colored eyes in an individual, produced 25‑offspring with his normal‑eyed wife. of their children, 15 were heterochromatic and 10 were‑normal. calculate the chi‑square value for this observation.

Two lines that do not intersect are skew. always sometimes or never

What is always true when two whole numbers are subtracted?