Using a punnet square list all the genotypes and describes the phenotypes ratios of F2?

Question

Using a punnet square list all the genotypes and describes the phenotypes ratios of F2?

Answer 1

monohybrid F2 phenotypic ratio is 3:1 and the genotypic ratio is 1:2:1 (eg TT, Tt  Tt,& tt).

dihybrid F2 phenotypic ratio is 9:3:3:1. and the genotypic ratio is 4 AaBb; 2 AABb;2 AaBB; 2 Aabb;  2aaBb; 1 AABB; 1AAbb; 1aaBB; 1aabb.

See link for the actual Punnett Squares  http://www.bcc.orst.edu/bio/classes/bi10...

Answer 2

You left out all the details, so no one can answer this.  Here's some help.

F2 tells you the generation.  Somewhere else in the question the parents were described.  F2 is the children.  F3 is the grandchildren.

A phenotype is which version of the characteristic you are describing the creature you are looking at has--for instance red eyes or white eyes.

The genotype is what genes the creature has that give it the phenotype.  These are described as homozygous (same genes-RR or rr) or heterozygous (different genes-Rr) and dominant (RR) or recessive (rr).  If a creature is heterozygous, it has one dominant and one recessive allele (the word I should be using instead of gene).  Also see that by choosing R and r, I am implying that Red eyes are dominant and white eyes are recessive.

A punnet square is the chart you've seen but havent understood that has one parent's genes as the column heading, and the other parent's as the row heading.  You then combine them in the squares in the chart.  You are trying to see all the possible combinations that the children could have.  Take one gene from each parent and fill in the chart.