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Chloroplast Inheritance

APBIO-FEVLMH

Crotons are a type of plant that has either solid green leaves or variegated yellow-spotted leaves. The variegated form is due to a mutation in the chloroplasts of the plant.

When pollen from a green-leafed croton is used to pollinate a variegated croton, all of the seeds the variegated croton progeny exhibit variegation.

Which of the following is MOST accurate explanation?

A

Variegation is a dominant trait that masks the appearance of the green-leafed appearance.

B

Variegation is a sex-linked trait whereby females have two copies of the variegated allele and thus, have a greater chance of passing on this trait to future progeny.

C

Variegation is inherited maternally through genes in the chloroplasts of the female gamete since the pollen (male gamete) contributes little more than a nucleus to the zygote formed.

D

The seeds of the plant grow into variegated leaves due to the amount of available sunlight.