Question

Required information To investigate the inheritance of color variegation in four-o'clocks, Carl Correns performed pairwise crosses between male (pollen) and female (ova) gametes from flowers growing on three types of branches: variegated, all white, and all green. Solid white branches are homoplasmic for mutant chloroplasts, solid green branches are homoplasmic for wild-type chloroplasts, and variegated branches are heteroplasmic for both types of chloroplasts. hundreds of progeny from a cross are all white, what can be concluded about the parent plants? Check All That Apply The ova had to come from a plant that was entirely white The ova had to come from a branch that was solid white The ova could have come from a branch that was solid white or variegated, but not solid green. The ova could have come from a branch that was solid white, solid green, or variegated. The pollen had to come from a plant that was entirely white. The pollen had to come from a branch that was solid white.

Answer 1

Qn.

Hundreds of progeny from a cross are all white, conclusion about parents:

The ova had to come from a branch that was solid white.

Qn.

A cross produced Hundreds of progeny that are mixture of white, green and variegated, conclusion about the parent plants :

The ova had to come from a branch that was variegated.

The pollen could have come from a branch that was white, variegated or green.

Because Chloroplasts is maternally inherited, so the phenotype of progeny fully dependent on the phenotype of female parent.

Qn.

In a new species of variegated plant ,color is determined by mutation in a chloroplast gene and chloroplasts are inherited from both parents. If all of the progeny from a cross are solid white, parent plants would be:

The ova could have come from a branch that was solid white.

The pollen could have come from a branch that was solid white.