Some cells contain two copies of each chromosome, and some cells contain only one copy of each chromosome. Which types of cells contain two copies of each chromosome? (Select all that apply). Group of answer choices. HELPPP

Skin Cell

Blood Cell

Sperm Cell

Egg Cell

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

How many chromosomes are in a gold fish?

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.