Question

which method compares traits between species to determine ancestor - descendant relationships?
a cladistics
b punnett square
c dihybrid cross
d karyotype

Explanation:

Cladistics is a method in biology that uses shared and derived traits to determine evolutionary relationships (ancestor - descendant) among species. A Punnett square is used in genetics to predict the genotypes of offspring from a cross. A dihybrid cross is a genetic cross involving two traits. A karyotype is a visual representation of an organism's chromosomes.

Answer:

A. Cladistics