Question

build vocabulary
punnett square diagram that can
be used to predict the genotype
and phenotype combinations of a
genetic cross
independent assortment one
of mendels principles that states
that genes for different traits can
segregate independently during
the formation of gametes
word origins the punnett square
is named after reginald punnett,
a british geneticist from the early
1900s. how many squares are
in a punnett square for a one-
factor cross?
how many for a two-factor cross?

Explanation:

Step1: Analyze one - factor cross

For a one - factor cross, each parent has 2 alleles. The number of squares in a Punnett square is calculated by multiplying the number of gamete types of each parent. Since each parent has 2 gamete types (for a single gene with 2 alleles), the number of squares is \(2\times2 = 4\).

Step2: Analyze two - factor cross

For a two - factor cross, each parent has \(2^2=4\) gamete types (using the formula \(2^n\), where \(n\) is the number of gene pairs, here \(n = 2\)). The number of squares in the Punnett square is \(4\times4=16\).

Answer:

For a one - factor cross, the number of squares is \(4\). For a two - factor cross, the number of squares is \(16\).