Question

punnett square practice
tall height in plants is dominant to short height. use that information to answer the genetic problems below.
underline important information and write the alleles (letters) above to represent genotypes if they
arent given.
example problem: a tt (tall) plant is crossed with a tt (short plant).
probabilities
genotypes % phenotypes %
100% tt 100% tall
0% tt 0% short
0% tt
punnett square

1. a heterozygous (tall) plant (tt) is crossed with another heterozygous (tt) plant. (underline important

information and write the alleles)
probabilities
genotypes % phenotypes
%
25% tt 75% tall
50% tt
25% tt 25% short
punnett square

1. a homozygous dominant tall plant (tt) is crossed with a homozygous recessive short (tt) plant.

what are the genotypes and phenotype possibilities for the offspring?
probabilities
genotypes % phenotypes
%

1. in pea plants, purple flowers are dominant, white flowers are recessive. use the allele p to represent your

if two white - flowered plants are crossed, what percentage of their offspring will be white - flowered?
pp × pp
probabilities
genotypes % phenotypes
%
punnett square
punnett square
punnett square

Explanation:

Step1: Determine the alleles of parents

The homozygous dominant tall plant has alleles \(TT\), and the homozygous recessive short plant has alleles \(tt\).

Step2: Create Punnett square

Parents	\(T\)	\(T\)
\(t\)	\(Tt\)	\(Tt\)

Step3: Calculate genotypes and phenotypes

From the Punnett square, all offspring have the genotype \(Tt\). Since \(T\) (tall) is dominant over \(t\) (short), all offspring will be tall.

Answer:

Genotypes %	Phenotypes %