Determining Traits
This is the physical expression of a trait, like having brown eyes or curly hair.
What is a phenotype?
This is the number of columns in a Punnett Square.
What is 2?
This is the blank in the chain DNA-->mRNA-->_____-->trait
What is protein?
A change in a DNA sequence that can affect a protein is called this.
What is a mutation?
If an organism has two different alleles for a trait, it is described as this.
What is heterozygous?
In a cross between AA and Aa, this is the only impossible offspring genotype.
What is Aa?
DNA is copied into this molecule during transcription.
What is mRNA / RNA?
A trait that is hidden unless two copies are present is called this.
What is recessive?
A dominant allele will do this to a recessive allele when both are present.
What is mask or hide it?
In a cross between Aa and aa, this percent of offspring will show the recessive trait.
What is 50%?
This is the number of different nucleotide/base "letters" in DNA.
Different versions of a gene are called these.
What are alleles?
This type of genotype has two identical alleles, like AA or aa.
What is homozygous?
In a cross between AA and aa, all offspring will have this genotype.
What is Aa?
This is the number of bases in each codon.
What is 3?
When humans choose which organisms reproduce to change the traits in a populatin, it is called this.
What is artificial selection?
If a plant’s genotype is Aa, and “A” is dominant, this will be the expressed allele.
What is dominant?
In a cross between Aa and Aa, this is the probability of getting aa (as a percentage).
What is 25% (1 out of 4)?
This organelle is where proteins are made.
What is the ribosome?
This is the name for the building block of a protein.
What is an amino acid?