Does crossing over occur in mitosis or meiosis ? explain what happens during this process!

What evidence did mendel find that supported his law of independent assortment? a. dominant traits are expressed when there is a dominant allele. b. traits do not affect the inheritance of other traits. c. some traits have three or four different alleles. d. plants and animals can both reproduce sexually.

One of the purposes of transcription is to produce a sequence of bases that

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?