3. (a) (i) Draw a simple diagram of a plant cell as seen under a light microscope - Leaving Cert Agricultural Science - Question 3 - 2015
Question 3
3. (a) (i) Draw a simple diagram of a plant cell as seen under a light microscope.
Label any three parts, other than chromosomes.
(ii) Where in the cell are the ch... show full transcript
Worked Solution & Example Answer:3. (a) (i) Draw a simple diagram of a plant cell as seen under a light microscope - Leaving Cert Agricultural Science - Question 3 - 2015
Step 1
Draw a simple diagram of a plant cell as seen under a light microscope. Label any three parts, other than chromosomes.
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Answer
To draw a plant cell, illustrate the following components:
Cell Wall: A rigid boundary surrounding the cell.
Nucleus: The control center of the cell, containing genetic material.
Cytoplasm: The jelly-like substance where cell components are suspended.
Make sure to ensure correct shapes and boundaries in your diagram to maximize marks.
Step 2
Where in the cell are the chromosomes found?
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Answer
Chromosomes are found in the nucleus of the cell. They contain the genetic information that is passed down through generations.
Step 3
Name the process by which an animal or plant cell divides into two identical cells.
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Answer
The process by which an animal or plant cell divides into two identical cells is called mitosis.
Step 4
In wheat, the allele for red kernel (R) is dominant over the allele for white kernel (r). A wheat plant, homozygous for red kernel (RR), is crossed with a plant homozygous for white kernel (rr). Copy the following into your answer book and complete the spaces.
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Answer
Genotypes of original parents: (RR) × (rr)
(i) Possible gametes: R, r
(ii) F1 genotype: Rr
(iii) F1 phenotype: Red
Step 5
In your answer book, show a cross between a homozygous recessive plant and an F1 plant from the above cross.
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Answer
Homozygous recessive: (rr)
(i) Genotypes of parents: (rr) × (Rr)
(ii) Possible gametes: r, R
(iii) Genotypes of offspring: Rr, rr
(iv) Phenotypes of offspring: Red, White
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