Consider a diploid cell that contains three pairs of chromosomes designated AA, BB, and CC. each pair includes a maternal and paternal member. during meiosis I, assuming no crossing over, what chromatid combinations will be present at the completion of prophase I

There will still be six chromosomes but 12 sister chromatids

Explanation:

In meiosis 1, at the interphase (the S (synthesis) phase), replication of DNA occurs leading to the duplication of each chromosomes which at that point is just a sister chromatid with the centromere at the middle for each chromosome.

After interphase, at prophase 1, the chromosomes found will be two sister chromatids with the centromere at the middle for each chromosome.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

answer; behavioral neuroscience;