Biology - Genetics - 3.6 - Punnett Squares

Punnett square

A ____ can be used to determine a missing genotype.

dihybrid

A cross between individuals that have different alleles for the same gene; A hybrid that is heterozygous for alleles of two different genes.

4

An individual with two genes each having two alleles, an individual has ____ alleles.

homozygous

An organism that has two identical alleles for a trait

genotype

An organism's basic makeup, or allele combinations.

homozygous dominant

Both alleles (factors) for a trait are the same and dominant (AA)

homozygous recessive

Both alleles (factors) for a trait are the same and recessive (aa)

homos

Greek for "same".

di

Greek prefix for two, twice, or double

heter or hetero

Greek word that means: "other" or "different"

16

How many different combinations can 4 alleles result in?

allele

One of a number of different forms of a gene

on the side of the chart

The gametes produced by the female parent are ____ of the Punnett Square

at the top of the chart

The gametes produced by the male parent are ____ of the Punnett Square

phenotype

The physical characteristics of an organism; Visible traits;

A Punnett square can be used to determine a missing genotype based on the other genotypes involved in a cross.

Write this sentence: A Punnett square can be used to determine a missing ____ based on the ____ ____ involved in a ____.

Punnett square

You can predict the percentages of phenotypes in the offspring of a cross from their genotypes by using a ____.

Punnett square

a chart that allows you to easily determine the expected percentage of different genotypes in the offspring of two parents

heterozygous

having two different alleles for a trait

gametes

reproductive cells