Punnett Squares
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?
What is GG, GG, Gg, Gg
Hh, Zz, Xx. Each of these are _______________.
What is heterozygous.
The method we use today to predict the traits of offspring is ________________ .
What is the Punnett Square.
Complete a Punnett square for Gg and Gg.
What is GG, Gg, Gg, gg
A pair of alleles that are the same are called __________________.
What is homozygous.
HH, TT, zz. Each of these are ______________________.
What is homozygous.
Capital letters always represent the _____________ allele.
What is dominant.
Complete a Punnett square someone who is heterozygous for tall and for someone who is homozygous for short.
What is Tt, Tt, tt, tt
A pair of alleles that are different are called ____________________.
What is heterozygous.
Jim and Jane are both heterozygous for being tall. What are the chances that they will have a short child?
What is 25% chance.
A _______________ trait is a trait that masks the recessive trait.
What is dominant.
Complete a Punnett square for someone who is Homozygous for green eyes and someone who has blue eyes. Green is dominant over blue.
What is Gg, Gg, Gg, Gg.
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?
What is 75% dark skin and 25% light skin.
___________________ describes a pair of alleles and is represented by letters such as Tt or TT.
What is genotype.
GG, Gg, Gg, gg. Green eyes are dominant to blue eyes. What percent have green eyes? What percent have blue eyes?
What is 75% and 25%.
A ______________ trait is a trait that is hidden by the dominant gene.
What is recessive.
The four answers for a Punnett square are Zz, Zz, zz, zz. What are the genotypes for the parents?
What is Zz and zz.
James is heterozygous for big lips. His wife also has big lips, but one of their children has small lips. What is his wife's genotype?
(Use B - Big lips & b - little lips)
What is Bb.
__________________ is simply the expression of the genotype. It is how the trait is expressed (ie. dark hair, tall, big lips, etc.)
What is phenotype.
Write the parents: (Use G & g)
Homozygous dominant crossed with heterozygous
What is.... GG x Gg
The name of the monk who introduced the science of genetics by studying peas.
Who is Gregor Mendel?