Potassium-40 has a half life of 1.251×billion<span> years</span><span>. To determine the percentage potassium-40 remaining after 3.9 billion years, divide
3.9 by 1.251, = 3.12.
This is the number of times the original amount of potassium-40 reduces by 50%. The remaining percentage is therefore 100%/(3.12 * 2) = 16.03%.</span>
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.
Diploid. There has to be 2 existing cells already, in order for it to split into 4
The answer is c! I don’t really have much of an explanantion I just know haha
Answer:
1/2
Explanation:
Ggrr gives Gr, Gr, gr, gr
ggRR gives gR only.
So, the combination would be <u>GrRr</u>, <u>GrRr</u>, ggRr, ggRr
To have both dominant traits, the child has to GG or Gr, and RR or Rr
2/4=1/2
