Question

math connections
name: joshua weary
date: 10/23/15
punnett squares can be used to determine genotypic and phenotypic ratios. the dominant alleles will
mask recessive alleles. freckles are a dominant trait inherited from our parents.
the tree diagram below shows the genetic combinations passed from one generation to the next. use
this diagram to answer the questions below and figure out the genetic combination each child
received.

1. create a punnett square to be used in describing the outcomes for children 1 - 3.
2. child 1 and child 2 inherited the genotype predicted to be present in 50% of the offsprin

what is their genotype for having freckles?

Explanation:

Step1: Create Punnett square

Parents for Children 1 - 3 have genotype \(Ff\) and \(Ff\).

	\(F\)	\(f\)
\(f\)	\(Ff\)	\(ff\)

Step2: Analyze genotype ratios

From the Punnett square, \(FF:Ff:ff = 1:2:1\). The genotype present in \(50\%\) (or \(\frac{2}{4}\)) of the offspring is \(Ff\).

Answer:

1. Punnett square as shown above.
2. \(Ff\)