Genes x, y, and z are linked. crossover gametes between genes x and y are observed with a frequency of 25%, and crossover gametes between genes y and z are observed with a frequency of 5%. what is the expected frequency of double crossover gametes among these genes?

Waianapanapa beach in hawaii is a black-sand beach that was formed by waves crashing against volcanic rock. the sand can be very hot on sunny days. which statement best explains why? o a. the black sand has no heat capacity. b. the black sand absorbs no radiation. o c. the black sand is immune to insolation. d. the black sand has a low albedo.

What is the problem in this article? what solution does the article propose?

Which of these is not a nucleotide base found in dna?