Question

practice with pedigrees
a pedigree is a genetic family tree, or a family tree of genetics. generations in a
pedigree are differentiated by numbering top to bottom starting with the oldest, or
first, generation. information, like multiple offspring, within one generation is
numbered left to right, starting with the oldest individual. females are represented
with a circle and males are represented with a square. a question mark signifies an
unknown genotype.
how is information for one generation in a pedigree
numbered?
bottom to top, starting with females
left to right, starting with the oldest individual
top to bottom, starting with males

Explanation:

The text about pedigrees states that within one generation, information (like multiple offspring) is numbered left to right, starting with the oldest individual. The first option is incorrect as generations are numbered top - to - bottom, not bottom - to - top, and not starting with females. The third option is incorrect as within a generation, it's left - to - right (not top - to - bottom) and not starting with males. So the correct option is the one that matches the description from the text.

Answer:

B. left to right, starting with the oldest individual