Punnett Squares
Complete a punnet square for Tt and Tt. Give the gentotypic ratios of the offspring.
What is TT, Tt, Tt, and tt.
Jimmy has a big nose. Sally does not have a big nose. All of their children do have big noses. What are the parents genotypes?
What is Jimmy is homozygous dominant. Sally is homozygous recessive.
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.
A hitchhikers thumb in humans in dominant/recessive inheritance. A person who is purebred for hitchhikers thumb is crossed with a person who is pure bred for no hitchhikers thumb. All of the offspring have a hitchhikers thumb. Which trait is dominant and which trait is recessive? Show a punnett square to support your answer.
What is hitchhiker thumb is dominnant, no hh thumb is recessive.
Jared is heterozygous for brown hair. His wife is homozygous for blonde hair. What are the percentages for genotypes of their child?
What is 50 % Heterozygous, 50% homozygous recessive.
HH, TT, zz. Each of these are homozygous or _____________.
What is purebred.
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. Give the genotypic ratios of the offspring.
What is Heterozygous 2:4; homozygous recessive 2:4
A pair of alleles that are different are called ____________________.
What is heterozygous.
A _______________ is a way to represent family history of a trait in chart form.
What is Pedigree.
In cats, black fur is dominant. If a black cat is crossed with a white cat, and the litter contains white offspring, the genotype of the black fur parent is what? Show a punnett square to support your answer.
What is heterozygous
Tim and Jenny both have dark skin, but each of them are carriers of the recessive allele for light skin. What are the chances that their children will inherit each phenotype?
What is 75% dark skin and 25% light skin.
A condition in which both alleles in a heterozygous individual are fully expressed in the phenotype. Ex: blue+yellow=blue and yellow spots
What is co-dominance.
A ______________ trait is a trait that is hidden by the dominant gene and must have two copies of that allele to be seen in the phenotype.
What is recessive.
A person with A blood type is crossed with person that is B blood. They have children with type O blood- a recessive trait. What are the genotypes of the each parent? Show a punnett square to support your answer.
What is type IAIo and IBIo.
DOUBLE JEAOPARDY!!
Teto is a fire-breathing dragon. His mate, Angie, is not fire breathing. Fire breathing is a recessive trait. What are is the percent chance their offspring will be fire breathing?
What is it depends on if Angie is AA or Aa. If she is AA, none will be fire-breathing. If she is Aa, 50% will be fire breathing.
A condition in which neither allele in a heterozygous individual is fully dominant, resulting in an intermediate phenotype. ex. blue+yellow=green
What is incomplete dominance.
DOUBLE JEOPARDY!!
Write a word problem that will have the following results: The children have a 75% chance of having straight teeth and a 25% chance of having crooked teeth.
What is.... answers vary.
What is the first name of the father of genetics?
What is Gregor.