If someone adds thousands of small fish to a lake, how would the number of big fish
change?

mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

explanation:

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.