Question

the punnett square shows the results of a self-crossing of the f₁ generation of a cross between round, yellow peas and wrinkled green peas.1. list the different genotypes in the f₂ generation. what is the frequency of each genotype? draw a check next to you.|genotype|frequency|| ---- | ---- ||rryy|$\frac{1}{16}$|| | || | || | || | ||rryy|$\frac{1}{16}$|2. list the different phenotypes in the f₂ generation. what is the frequency of each phenotype? draw a check next to you.|phenotype|frequency|| ---- | ---- || | || | || | ||wrinkled, green|$\frac{1}{16}$|chapter 12: dnavocabulary:• base pairing• replication• dna polymerase• telomereskey concepts:• double stranded - held together by hydrogen bonds.• in complementary strands of dna: a bonds with t | g bonds with c• example: determine the complement strand of dna to: ggtagcta• answer: ccatcgat• dna structure

Explanation:

Step1: Identify all F₂ genotypes

From the Punnett square, list unique genotypes:
RRYY, RRYy, RRyy, RrYY, RrYy, Rryy, rrYY, rrYy, rryy

Step2: Count each genotype's occurrences

• RRYY: 1, RRYy: 2, RRyy:1, RrYY:2, RrYy:4, Rryy:2, rrYY:1, rrYy:2, rryy:1

Total Punnett square entries = 16. Frequency = $\frac{\text{Count}}{16}$

Step3: Calculate genotype frequencies

• RRYY: $\frac{1}{16}$, RRYy: $\frac{2}{16}=\frac{1}{8}$, RRyy: $\frac{1}{16}$
• RrYY: $\frac{2}{16}=\frac{1}{8}$, RrYy: $\frac{4}{16}=\frac{1}{4}$, Rryy: $\frac{2}{16}=\frac{1}{8}$
• rrYY: $\frac{1}{16}$, rrYy: $\frac{2}{16}=\frac{1}{8}$, rryy: $\frac{1}{16}$

Step4: Map genotypes to phenotypes

• Round, yellow: RRYY, RRYy, RrYY, RrYy
• Round, green: RRyy, Rryy
• Wrinkled, yellow: rrYY, rrYy
• Wrinkled, green: rryy

Step5: Calculate phenotype frequencies

• Round, yellow: $\frac{1+2+2+4}{16}=\frac{9}{16}$
• Round, green: $\frac{1+2}{16}=\frac{3}{16}$
• Wrinkled, yellow: $\frac{1+2}{16}=\frac{3}{16}$
• Wrinkled, green: $\frac{1}{16}$

Answer:

Genotype Table

Genotype	Frequency
RRYy	$\frac{1}{8}$
RRyy	$\frac{1}{16}$
RrYY	$\frac{1}{8}$
RrYy	$\frac{1}{4}$
Rryy	$\frac{1}{8}$
rrYY	$\frac{1}{16}$
rrYy	$\frac{1}{8}$
rryy	$\frac{1}{16}$

Phenotype Table

Phenotype	Frequency
Round, green	$\frac{3}{16}$
Wrinkled, yellow	$\frac{3}{16}$
Wrinkled, green	$\frac{1}{16}$