How is inheritance of chloroplast genomes determined in Chlamydomonas ? Both par

Question

How is inheritance of chloroplast genomes determined in Chlamydomonas?

Both parents make an equal chloroplast genome contribution to the zygote. A chloroplast gene specifies the uniparental inheritance of the chloroplast genome from the mt+ parent. Both parents make an equal chloroplast genome contribution to the zygote. The chloroplast genome is biparentally inherited and offspring are heteroplasmic. The mt+ (mating-type plus) gamete is much larger than the mt- (mating-type minus) gamete. Therefore, only the mt+ parent contributes chloroplast genomes to the zygote. The nuclear mating-type (mt) locus specifies inheritance of chloroplast genomes. Both parents make an equal chloroplast genome contribution to the zygote. Only the genome contributed by the mt+ (mating-type plus) parent is maintained.

Explanation / Answer

The mt+ (mating-type plus) gamete is much larger than the mt-(mating-type minus) gamete. Therefore, only the mt+ parent contributes chloroplast genomes to the zygote.

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