Hey Leeann479!
The chart that shows all the possible combinations of alleles that can result from a genetic cross is called a
Punnett Square! I've attached an example of one to this answer.
Hope this helps!
(image credit: Wikipedia)
Answer:
Algea
Explanation:
Algae produce about 330 billion tons of oxygen each year.
C. bb because the white allele is recessive
Answer:
The presence of an additional chromosome
Explanation:
Look at "pair" 21. See how there are THREE chromosomes instead of TWO? Normally, there would only be two chromosomes in each pair but this karyotype shows a trisomy (see def. below) of the 21st pair. This was caused by a nondisjunction mutation of the 21st pair. The is also the karyotype of a person with Down's Syndrome.
Definition of Trisomy:
A condition of the presence of three chromosomes in a pair instead of two. This normally causes developmental irregularity.