Wednesday Daily Questions and video

Wednesday February 13^th

*Which type of reproduction provides more genetic diversity sexual or asexual reproduction?
Sexual.  In sexual reproduction there are two parents that contribute DNA to the offspring.  Because of this all the offspring will be slightly different (with the exception of identical twins) and the offpsring will all be a different combination of their parents DNA.

*Sexual reproducing organisms contain cells that have TWO sets of Chromosomes (homologous Chromosomes).  What is the name of these types of CELLS? Diploid.  Di= 2

*How many sets of chromosomes are found in our sex cells? One - they are HAPLOID

Keystone QOD
Increased exercise can lead to an increased number of mitochondria in the skeletal muscle cells.  Which of the following BEST describes the aspect of increased exercise that leads to this change?

A.  Increased requirement of energy for immediate use

B.  decreased supply of energy in long-term storage form

C.   decreased time span for maintenance of recently stored energy

D.  increased volume requirements for storing energy in stable form.
This question was really about the role of mitochondria.  Remember, mitochondria are the organelles in our cells that produce ATP (our molecule of energy)  So the question really was assessing if you know the role of the mitochondria.

After this some classes watched a video about ligers which was to show you about how each organism has a specific number of chromosomes.  The breeding of a tiger and lion works because both of them have 30 chromosomes. We discussed this a little more as a class.  Stay tuned for more "weird science"!