Question

1. cross a heterozygous tall plant with a short plant.use a punnett square to show your work. (no credit given without punnett square.)

a. what are the genotypic ratios?
b. what are the phenotypic ratios?
insert a picture of your work here

1. cross a homozygous inflated pod shape with a heterozygous pod shape.

a. what are the genotypic ratios?
b. what are the phenotypic ratios?
insert a picture of your work here

1. if a heterozygous round seeded plant is crossed with another plant and the ratio of offspring is 3:1 round:wrinkled seeds. what is the genotype of the unknown parent plant? use a punnett square to show your work. (no credit given without punnett square.

insert a picture of your work here

Explanation:

8.

Punnett Square:

Let \( T \) represent the allele for tall (dominant) and \( t \) represent the allele for short (recessive). The heterozygous tall plant has a genotype of \( Tt \), and the short plant has a genotype of \( tt \).

	\( T \)	\( t \)
\( t \)	\( Tt \)	\( tt \)

a. Genotypic Ratios:

Step1: Count Genotypes

Count the number of each genotype (\( Tt \) and \( tt \)). There are 2 \( Tt \) and 2 \( tt \).
The genotypic ratio is \( Tt:tt = 1:1 \)

b. Phenotypic Ratios:

Step1: Determine Phenotypes

\( Tt \) is tall (dominant phenotype) and \( tt \) is short (recessive phenotype).
Count the number of each phenotype. There are 2 tall (\( Tt \)) and 2 short (\( tt \)).
The phenotypic ratio is \( \text{Tall}:\text{Short}=1:1 \)

9.

Let \( I \) represent the allele for inflated pod (dominant) and \( i \) represent the allele for constricted pod (recessive). The homozygous inflated - pod plant has a genotype of \( II \), and the heterozygous pod - shape plant has a genotype of \( Ii \).

	\( I \)	\( I \)
\( i \)	\( Ii \)	\( Ii \)

a. Genotypic Ratios:

Step1: Count Genotypes

Count the number of \( II \) and \( Ii \). There are 2 \( II \) and 2 \( Ii \).
The genotypic ratio is \( II:Ii = 1:1 \)

b. Phenotypic Ratios:

Step1: Determine Phenotypes

Both \( II \) and \( Ii \) show the inflated - pod (dominant) phenotype.
The phenotypic ratio is \( \text{Inflated}:\text{Constricted}=1:0 \) (all inflated)

10.

Let \( R \) represent the allele for round seeds (dominant) and \( r \) represent the allele for wrinkled seeds (recessive). The heterozygous round - seeded plant has a genotype of \( Rr \).
We know that the offspring ratio is \( 3:1\ (\text{round}:\text{wrinkled}) \). Using the Punnett square principle (\( Rr\times Rr \)):

	\( R \)	\( r \)
\( r \)	\( Rr \)	\( rr \)

Step1: Analyze Offspring Ratios

In a \( Rr\times Rr \) cross:

• Genotypes: \( RR:Rr:rr = 1:2:1 \)
• Phenotypes: \( \text{Round}(\text{RR}+\text{Rr}):\text{Wrinkled}(rr)=3:1 \)

The genotype of the unknown parent plant is \( Rr \)

Answer:

s:
8.
a. \( Tt:tt = 1:1 \)
b. \( \text{Tall}:\text{Short}=1:1 \)
9.
a. \( II:Ii = 1:1 \)
b. \( \text{Inflated}:\text{Constricted}=1:0 \)

1. \( Rr \)