Test 3 Flashcards
Genes
Locations on a chromosome dealing with a specific trait.
Alleles
Letters used to represent genes.
Homozygous
Having two of the same alleles.
Heterozygous
Having two different alleles.
Genotype
The alleles.
Phenotype
The physical expression (What does it look like).
Dominant masks?
Recessive.
What is F1?
The first generation.
What happens in incomplete dominance?
The only thing that changes is the phenotype of the heterozygote.
How do you do a test cross?
Done by crossing unknown with a homozygous recessive then look at the phenotype of offspring.
Why do you do a test cross?
When an allele of a parent is unknown.
What chromosome determines sex?
23rd
How many alleles does human blood have?
3 (Immunoglobin)
What is the allele of human blood Type A?
I^A I^A, I^Ai
What is the allele of human blood Type B?
I^B I^B, I^Bi
What is the allele of human blood Type AB?
I^A I^B
What is the allele of human blood Type O?
ii
What did Mendel study in terms of genetics?
Pea plants and the flower color of the pea plants.
DNA Replication and Protein Synthesis take place in what phase of the cell cycle?
The synthesis or S phase.
Semi conservative means?
Keeps old parts.
What is protein synthesis-transportation?
Copied from DNA —> RNA to ribosome unzips —> messenger RNA fills in with Uracil.
What is a codon?
3 base pairs = one amino acid
What are the stop codons?
UGA, UAA, UAG
What is the start codon?
Methionine
