Question

A plant has a genotype of SsYy for Seed shape (S=round, s= wrinkled) and seed color. (Y= Yellow y= green.) What allele combinations could this plant have in its gametes? (Hint: what combination of shape and color alleles would their sperm/egg contain?)

Answer 1

Gametes) SY, Sy, sY, sy

Step-by-step explanation:

• SS or Ss = round, dominant
• ss = wrinkled, recessive
• YY or Yy = Yellow, dominant
• yy = green, recessive
• A plant has a genotype of SsYy

Genotype) Ss Yy

Gametes) SY, Sy, sY, sy

When the germ cell suffers meiosis, there are four possible types of daughter cells (gametes)

Chromosome ---S-------Y----

---s--------y----

----S-------y---

----s-------Y----

Genes are diallelic and gametes result from all the possible combinations among the allele types present in the cell. In this example, there are two heterozygous genes.

S combines with Y and y

s combines with Y and y

If it is easier for you, you can make a diagram

S ------- Y ------> SY

S-------- y ------> Sy

s --------Y -------> sY

s -------- y -------> sy