Afemale received genes from qrst from her mother and qrst from her father. which of the following gene combinations could be present in her sex cells: qrst, qrst, qrstt, qrsst, qrst, or qrst

The answer for #3 is c but i don't know why

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)