Punnett Squares
Complete a punnett square for TT and tt. What percent are heterozgyous?
100%
Jimmy has a big nose. His genotype is GG. Sally also has a big nose. Her genotype is Gg. What are the possibilities for their children's genotypes?
GG and Gg
___________ is the passing down of traits from one generation to the next.
heredity
Hh, Zz, Xx. Each of these are _______________.
heterozgyous
What do we use to predict offspring genotype and phenotype?
punnett squares
Complete a punnett square for Gg and Gg. What are the possible genotypes?
GG, Gg, gg
Jared is homozygous for brown hair. His wife is homozygous for blonde hair. Brown hair is dominant to blonde hair. What are the possible genotypes for their children?
Bb
A pair of alleles that are the same are called __________________.
homozygous
HH, TT, zz. Each of these are ______________________.
Capital letters are always represented by the _____________ allele, not the recessive allele.
dominant
Complete a punnett square for someone who is Bb for brown hair and someone who is bb for blonde hair. What percent of children have blonde hair?
50%
Mike is heterozygous for brown eyes. His wife has blue eyes. What percentage of their children will most likely have brown eyes? What percentage will most likely have blue eyes?
50% brown and 50% blue eyes
A pair of alleles that are different are called ____________________.
heterozygous
Jim and Jane are both heterozygous for being tall. What are the chances that they will have a short child?
25%
A _______________ trait is a trait that is expressed or shown.
dominant
Complete a punnett square for someone who is homozygous recessive for green eyes and someone who homozygous dominant for brown. What are the phenotypes of their offspring?
brown eyes
Tim and Jenny both have dark skin, but each of them carry a recessive trait for light skin. What are the chances that their children will have dark skin? Light skin?
75% dark skin and 25% light skin
___________________ describes a pair of alleles and is represented by letters such as Tt or TT.
genotype
GG, Gg, Gg, gg. Green eyes are dominant to blue eyes. What percent have green eyes? What percent have blue eyes?
75% and 25%
A ______________ trait is a trait that is hidden by the dominant gene.
recessive
The four answers to a punnett square are Zz, Zz, zz, zz. What are the genotypes of the parents?
Zz and zz
James is homozygous for big lips. His wife also has big lips, but one of their children has small lips. What is his wife's genotype?
NOT POSSIBLE
or someone cheated on someone...
__________________ is simply the expression of the genotype
phenotype
Write a word problem that will have the following results: The children have a 50% chance of having straight teeth and a 50% chance of having crooked teeth.
answers vary
What is the name of the 19th century monk that used pea plants to discover genes?
Gregor Mendel