Why are punnets square’s used to calculate the probability of genotypes and phenotypes of one child. In other words why is it inappropriate to say “two out of four of their children will have brown hair” Please help me

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone

What element is able to combine with itself and hydrogen to form large molecules ?

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.