The term ___ is added to the names of those projections in which the central ray is less than 90 degrees to any of the body planes.

What type of weathering occurs when rock minerals change composition?

Which of the following is not a viable chromosome combination?

 Males are born with all the spermatocytes they will ever produce.

An extra set of chromosomes is called

After Meiosis I, the number of chromosomes in each daughter cell is _________ that of the parental cell.

 Meiosis has to occur in sexually reproducing organisms to produce cells with half the number of chromosomes.

Trisomy 21 Karyotype.jpg The Karyotype above represents what type of chromosomal abnormality?

As a woman ages, her chances of having a child with a chromosomal abnormality increases.  This generally does not happen with males.  Explain this phenomenon.

Which of the following scenarios would cause an aneuploid cell to be produced?