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?
the observed physical description of the organism
What is phenotype?
A fertilized egg
What is a zygote?
The allele that is expressed in the offspring
What is a dominant allele?
how likely something is to happen...expressed in numbers between 0 an 1, inclusive.
What is probability?
The allele that is not expressed in the offspring
What is a recessive allele?
Passing of genes from one generation to the next is called?
Heredity
The two letters representing the genotype of a plant heterozygous for tall
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?
A cell that contains a single set of chromosomes
What is haploid?
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)
When the phenotype is an intermediate version of the parents...a red flower crossed to a white flower produces a pink flower
What is incomplete dominance?
The letters representing homozygous recessive: HH, Hh, or hh
What is hh (little h/ little h)?
This genotype is represented by Hh.
What is heterozygous?
Crossing a homozygous dominant genotype with a homozygous recessive genotype always results in this genotype
What is heterozygous?
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%?
The probability of a recessive phenotype when both parents are heterozygous
What is 25%?