Question

(A) Describe how genetic information is carried in chloroplasts and mitochondria (1 point).
(B) Explain how the inheritance pattern shown in Figure 1 supports a role for chloroplast genes in the production of chlorophyll in the variegated plants (1 point).
(C) Ovules produced by an entirely green plant contain a rare mutation in a nuclear gene that is involved in chlorophyll synthesis, and the gene encodes a nonfunctional protein. Predict the most likely color of the leaves on plants that are produced when these ovules are fertilized by pollen from a wild-type green plant (1 point).
(D) Provide reasoning to justify your prediction (1 point).

Answer 1

Answer:

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Explanation:

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Answer 2

A) As most of the proteins in these organelles are encoded by nuclear DNA, thus, cholorplast & mitochondria carry genetic information through them.

B) The branch that is pure green will produce eggs with green chloroplasts that will give rise to a pure green offspring.

• Thus, a pure white branch will have offspring with ovules with an exclusive content of white chloroplasts and will give rise to a pure white offspring.

C) The color of the ovule is green is due to the presence of chloroplast.

• The genes is responsible for the green color of the plant and the color of an ovule.

• Hence, the genes are responsible for the production of the green color in the plants and the chloroplast.

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