what is a punnett square.?

Answer 1

A punnett square is a square with four boxes. It has two letters, symbolizing a genetic trait, such as height. On the top, you put the mother's genetic traits, and the father's go along the left side.

The, you combine the letters by pairing them. Here's an example. Let's say your father is tall, and your mother is medium size. Let's make T the symbol for tall height and t for short. Your mother would be Tt across the top, and your father would be TT along the left side.

Then you pair. You make the taller letter go first. Ex: the left top would be TT, the left bottom would be TT, the right top would be Tt, and the bottom right would be Tt.

Then you find the percentage of chance that you will be tall or medium size. TT makes up 50% of the square, meaning that there is a 50% chance you will be tall, and Tt makes up the other 50%, leaving you with a 50% chance of being medium sized.

I also included a picture of several punnett squares that illustrated my point.

I hope this helped you.

Answer 2

If you know the genotypes of parents, you can use a punnett square to show the probability of the offsprings' genotypes and phenotypes. Get a genetics or biology book for the visual representation. Basically, each possible gamete from mom and dad is assigned to an individual column or row with the vertical column = female and horizontal row = male. Its possible to predict the new generation by combining the genetic info of the parents gametes and entering the results in the boxes. This shows all possible fertilization events. Genotypes and phenotypes can now be read.

Answer 3

Definitions of Punnett square on the Web:

A diagrammatic representation of a particular cross used to predict the progeny of the cross. A grid used as a graphic representation of the progeny zygotes resulting from different gamete fusions in a specific cross.
helios.bto.ed.ac.uk/bto/glossary/p.htm

A method of showing the potential offspring of two parents.
www.hdsa.org/site/PageServer

A tool used to help predict the results of genetic crosses.
chroma.gs.washington.edu/outreach/genetics/glossary.html

A two-dimensional grid used to determine the possible zygotes obtainable from a mating.
www.alpacas.com/AlpacaLibrary/GlossaryPQ.aspx

a chart used to determine the possible genotypes of the offspring of a cross
www.mun.ca/educ/ed4361/virtual_academy/campus_a/desrosiersl/terminology1.htm

A Punnett square is a tool in genetics developed by British geneticist Reginald Punnett, and which biologists still use to predict the probability of possible genotypes of offspring.
en.wikipedia.org/wiki/Punnett_square

Answer 4

It is a square diagram used to determine genetic information from both mother and father. Example: Mom has brown eyes, dad has blue eyes. You would set it up like a four boxed square. Mom = BB, dad= bb. You would put each of the letters (one set broken up from mom and dad.) on top and the side of the square, then place the b's accordingly to determine the eye colr (hair color, whatever you want) of the offspring. This is the best description I can give you without drawing it. Ex. Bb= brown eyes, bb=blue, BB=brown.

Answer 5

A punnett square shows every possible combination when combining one maternal allele with one paternal allele.

Answer 6

Its a chart that is used to predict possible outcomes of the genetic makeup (genotypes) of offspring based on the genetic makeup of both parents. It usually involes only one or two traits and becomes more complicated as the number of traits studied increases.

Answer 7

A method of showing the potential offspring of two parents.

You plug in different gametes to predict to the zygotes. But thats just from memory- dont quote me.

Answer 8

it is a square that helps you solve the probability of a certain trait if a plant or animal.

look here
http://www.usoe.k12.ut.us/curr/science/sciber00/7th/genetics/sciber/punnett.htm


http://anthro.palomar.edu/mendel/mendel_2.htm

Answer 9

b/c its not cubed