Question

Station #7 The three different flower colors comes from the same plant. TA) What does the diagram show? Complete dominant, incomplete dominance, or Don't know TB) Use a Punnett square to represent the above result. On the left side of the Punnett, show a key on the symbols you use. On the right side, show the theoretical ratio of the three flower colors obtained from the Punnett square. 7C) What are the genotypes and phenotypes of the parent plants? Station #8 RRYY BA) What are the two phenotypes (features) being RY studied here? 8B) Which phenotypes are dominant? RRY RRY RY 8C) Write the phenotypes below each number of the following ratio. 9 : 3 : 3 : 1

Answer 1

Since the picture in question 1 is not coloured, I am going to assume it's the case of snapdragons.

In snapdragons, there is incomplete dominance. Three kinds of flower are produced- red, white and pink.

When RR genotype is present we see red flower. In case of rr we get white flowers.

But when we get Rr we observe pink , mixture of both, instead of red which would be the case of R was dominant .

Since R is incomplete dominance over r, we get pink flowers.

	R	R
r	Rr	Rr
r	Rr	Rr

Red flower	RR
White flowers	rr
Pink flowers	Rr

Answer- it is a case of incomplete dominance.

In table one,an example of cross is shown. When we cross red flower with white flowers we get all pink flowers.

Genotype of parents plants- RR,rr

Phenotype of parents plants-red. White.

Answer 2.

Two phenotype studied- shape of seed and colour of seed.

Dominant phenotype- RR- round seed, YY - yellow seed

Ratio	phenotype
9	round and yellow seed
3	round and green seed
3	wrinkled and yellow
1	wrinkled and green