Genetics 1
The unit that determines traits
What is a gene?
The man whom history credits as the founder of heredity, or, genetics
Who is Gregor Mendel?
An organism's complete genetic makeup.
What is a genotype?
The physical appearance of an organism
What is a phenotype?
Brown eyes, tall, blonde hair are all the ____ of the organism
What is phenotype?
The stronger of the two kinds of alleles
What is a dominant allele?
Heredity works by a combination of chance, or what we also call...
Probability
The weaker of the two kinds of alleles
What is a recessive allele?
Passing of genes from one generation to the next is called?
Heredity
This is a heterozygous genotype: AA Tt gg
What is big T; little t? Tt
A genotype that contains two of the same allele
What is a homozygous genotype?
The information needed to fill in a Punnett square
What are the parents genotype?
The classification of this genotype: pp
What is homozygous recessive
The probability of a heterozygous offspring when two heterozygous parents procreat.
What is 50%?
The two types of alleles possible
What is dominant and recessive?
In Mendel's pea plants, the first-generation hybrids expressed the dominant trait how often?
100% of the time
The genotypes of the parents if the offspring is tt
What is tt? (homozygous recessive)
Aa is classified as this
What is heterozygous?
This one is homozygous recessive: HH, Hh, or hh
What is hh (little h/ little h)?
This genotype is represented by Hh.
What is heterozygous dominant?
Crossing a homozygous dominant genotype with a homozygous recessive genotype never results in this genotype
What is homozygous recessive?
Gray eyes are a recessive trait. Cross a homozygous recessive mother and a heterozygous father. The odds of the child having gray eyes is
What is 50%?
Cross a heterozygous genotype with another heterozygous genotype. The probability of the recessive trait appearing would be this
What is 25%?