What is the difference between a monohybrid cross and a dihybrid cross?

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that

In which way are mercury and venus similar? they both rotate from east to west. they are both small and rocky. they both have thick atmospheres. they both are similar to earth in structure.