What is the purpose of the Punnet square?

Answer 1

A Punnett Square is a diagram used by biologists and geneticists to analyze crossbreeding, i.e. to determine the probability of the possible types of offspring which would result from crossing parents of similar or different genotypes and phenotypes. It is used to show every type of combination possible when one or more maternal and paternal alleles interact, for each gene being studied in the cross.

Though not always accurate, this diagram also generally teaches students that are studying genetics how receiving one allele from two different parents does not always have a straightforward outcome. It shows students that there are a large number of possibilities when paternal and maternal alleles interact, especially when one or more parent has an unknown allele.

Answer 2

To determine the possibilities of genotype in offspring. A punnet square isolates a certain gene or couple of genes from two parents and shows what genes their offpspring would have based on the dominant and recessive alleles of the parents.

Answer 3

A Punnett square shows the percentages of possible genotypes/phenotypes the offspring of two parents can have given the parents genotypes.

for example, for eye color, lets say a mother has blue eyes (bb) and a father has brown eyes (BB). Through using a punnett square you will be able to tell that there is a 100% chance that the offspring will have brown eyes with a genotype of Bb.

b b

B Bb Bb

B Bb Bb

as you can see, the fathers genotype is on the left and the mothers is on the top. When crossed, 100% of the genotypes are heterozygous Bb, meaning the dominant trait will show: Brown eyes.

Answer 4

the punnet square is used for combining genes of two people or animals to predict the outcome of an offspring

Answer 5

A punnet square is used to combine 2 or more types of genetic information.

Answer 6

It is used to determine the probability of the two parents offspring having a certain trait(s).

Answer 7

finding the genotype ratio for a cross. apex

Answer 8

Predicting the outcome of genetic crosses - Apex

Answer 9

Finding the genotype ratio for a cross. :)

Answer 10

predicting the outcome of a genetic cross