2. Describe any 10 practical applications of the knowledge of genetics to solve human problems (20 marks)
3. (a) Outline reasons why Gregor Mendel chose garden pea (Pisum sativum)
study of inheritance (6 marks)
(b) Give four conclusions drawn by Mendel based on observations in table
(8 marks)
Trait
Cross
F1
F2 count
F2 phen
Seed form
Round (R) * Wrinkled (W)
All R.
3 R:1
Cotyledon colour Yellow (Y) Green (G)
5474 R
1859 W
6022 Y
2001 G
All Y Y
3Y:1
(c) State Mendel's first law of segregation (4 marks)
SECTION B: CROP IMPROVEMENT
4. Write short notes on the following plant breeding methods (4 marks each)
i. pedigree selection​

How is mitosis different in plants and animals? a. in animals, the cell membrane pinches together. b. in plants,the dna is one circular chromosomes. c. in plants, there are no sister chromatids. d. in animals, a new cell wall forms.

Consider the motion of the balloon and its air contents in terms of momentum. in step 1 above, the total momentum of the balloon and its contents was zero. recall that momentum = mv. both the balloon and the air inside it had a velocity of zero and therefore the total momentum was zero. now think about what happened when the air escaped from the balloon. a certain mass of air accelerated in one direction. in order to keep the total momentum of the system zero, the balloon itself (which has mass) had to accelerate in the opposite direction. use this scenario to you explain why the soda can rotates when the water squirts out of the escape holes. what was your hypothesis concerning the water-filled can? according to your data, do you think your hypothesis was correct? (be sure to refer to your data when answering this question.) summarize any difficulties or problems you had in performing the experiment that might have affected the results. describe how you might change the procedure to avoid these problems. give at least one more example of newton's third law in everyday life.

Which prefix mean under less or below