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BIO unit 3
Terms in this set (21)
How do you get DNA and what does it do?
From our parents; codes everything about us (our traits)
What are nucleotides?
What are they made of?
Building blocks of DNA
two sides and a base of rungs (looks like a ladder)
What re the four different nitrogen bases?
What are the pairs of the nitrogen bases?
Adenine, thymine, cytosine, guanine
A/T and C/G
How many chromosomes does each human cell have?
Where in the DNA stored?
In the nucleus
What is a homologous pair?
Two chromosomes that look the same and hove the same genes
What does karyotyping do?
Helps figure out if the person has a genetic disease/ chromosomal defect
Made of many genes
DNA sequence that codes for different trait
Alternate form of a gene
How characteristics are passed on from parents to offspring
What is the parental generation known as?
What if the offspring (generation) known as?
(p) starting generation
(fi) first filial
Where do we find genes?
Why do we have two copies of the same gene for each trait?
On our chromosomes
Because we get two copies from each of our parents
What is an allele
Specific forms of genes
What is a genotype?
What is a phenotype?
Allele combo that you inherit
Allele combo that you portray
Hat is homozygous?
What I'd heterozygous?
The same (BB/bb)
Have different alleles (Bb)
What does a Punnett square do?
Predicts the probability of particular outcomes
What is complete dominance?
What is incomplete dominance?
When one trait is completely overpowering
Offspring have intermediate phenotype
What is codominance?
Both alleles are expressed in heterozygous offspring
What I'd polygenetic inheritance?
When two or more genes affect a single characteristic
Hat are some human characteristics controlled by multiple genes?
Height/ eye color/ hair color
Hey are recessive traits more visible in males?
Because they only get one X chromosome
What is the process of central dogma?
(Replication) DNA--> (transcription) RNA--> (translation) PROTEIN
What is a haploid cell?
What is a diploid cell?
A cell with only one chromosome
A cell with 2 sets of each chromosome
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