Heredity
What are the two versions of alleles?
Dominant and recessive.
True or False: A punnett square can predict more than one trait at a time.
True
True or False: The genotype can determine the phenotype.
True
What is the study of inheritance, or inherited traits?
Genetics
Who was the father of genetics?
Gregor Mendell
If a genotype contains both dominant and recessive alleles what is the correct term?
Heterozygous
What percent of offspring will show the recessive trait in the cross AA x aa?
0%
What is the difference between phenotype and genotype?
Phenotype is physical appearance, while genotype is the genetics.
What is the term for how traits are passed down to offspring?
Inheritance or heredity
What was the organism that Gregor Mendel used for his experiment?
Pea plants
What is something that is passed down from parents to offspring?
Traits or Genes
What is the probability of a carrier in a AA x aa cross?
100%
What is the general name for the genotype in which two identical alleles are present and can be a dominant or recessive phenotype?
Homozygous
What are the different versions of a gene called?
Alleles
In a Punnett square, what do the letters on the outside represent?
Parent genotypes
What is the probability of a homozygous recessive showing up between a cross of two heterozygous parents?
25%
Cross a homozygous recessive and a heterozygous. What is the probability of a homozygous recessive showing up?
50%
Name 5 traits that cannot be an inherited trait.
Hair dye, tattoos, piercings, body type, and braces-straightened teeth.
What is the term for the genetic makeup of an organism?
Genotype
Why can a recessive allele be present in a population without being observed?
It is masked by a dominant allele
In a cross between a homozygous dominant and a heterozygous, what are all of the possible genotypes?
AA and Aa
Both parents show a dominant trait, yet have a child that shows the recessive trait. How is this possible?
Both parents carry the recessive; Aa x Aa
What is the trait when both alleles are present in the offspring and don’t mask each other?
Codominant trait
What does DNA stand for?
Deoxyribonucleic acid
What cross results in a 1:2:1 genotype ratio?
Aa x Aa