What would mating between a true breeding purple flowered pea plant and a true breeding white flowered pea plant produce?

Answer 1

Make a Punnet Square:

White HETEROZYGOUS---Ww

Red HOMOZYGOUS--ww (this one is recessive because the white characteristic dominated in the heterozygous type)

So:

W w

w Ww ww

w Ww ww

These four are the potential types of the offspring, they will either be HETEROZYGOUS WHITE or HOMOZYGOUS RED, no homozygous white

Answer 2

Cross the purple (flowered) pea plant with a white (flowered) pea plant if all plants produced from this cross are purple the original purple parent is homozygous dominant. If the purple plant is heterozygous crossing with a homozygous recessive/white pea plant will result in offspring with a purple to white ratio of 1:1.

If this cross is being done without knowing whether purple is dominant or recessive a cross of a white
with a purple plant can be done to some effect in determining the status of each parent.
First assumption is that one of the parent plants has to be homozygous recessive.
If all offspring from the resulting mating are purple: purple is dominant and this parent is homozygous. The white plant is homozygous recessive in this case.
If all offspring from the resulting mating are white: white is dominant and this parent is homozygous.
The purple plant is homozygous recessive in this instance.

If the mating produces a 1:1 ratio of purple to white flowers the only definitive answer is that the dominant parent is heterozygous. Unfortunately an additional mating will be required to determine which color is dominant before a determination can be made regarding the zygousity of the original
purple parent. This can be done by crossing white offspring with white offspring and purple with purple offspring. The recessive color mating will produce 100% self colored plants.
Therefore, if the mating of purple to purple offspring produces 100% purple offspring the original purple parent was homozygous recessive.
If the same purple to purple mating produces some white offspring the original purple parent plant was heterozygous and purple is dominant.

Answer 3

All of the F1 offspring will be hybrid purple flowered pea plants.

Answer 4

they are fine; expected ratios might not be seen simply due to change

Answer 5

This would produce a hybrid.

Answer 6

l.