Cell life cycle , mitosis, DNA, genetics

What is the purpose of mitosis?

To replace damaged cells with an identical copy. To make more body cells.

What are the four bases of dna and how do they pair up?

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Record

Adenine,thymine,cytosine,guanine. Adenine with thymine, cytosine with guanine.

Gene

Carries information for traits.

Alllele

specific versions of a value for a gene

Heterozygous

Having two different alleles for a gene

What is the purpose of meiosis?

To produce gametes (sperm and egg cells)

Homozygous

having two identical alleles of a particular gene or genes.

Genotype

the actual genetic information for a trait

Phenotype

the physical representation of the genetic information.

Dominant allele

Always expressed if present.

Recessive allele

Only expressed if there is no dominant allele present.

Incomplete dominance

The dominant allele is not completely dominant over the recessive allele. This results in a blend of the two.

Codominance

Both alleles are dominant and will be expressed at the same time.

Multiple alleles

More than two alleles exist for a trait

Polygenic traits

more than one gene contributes to the trait.Not necessarily inherited together.

Sex linked traits

There are two human sex chromosomes, X and Y. Any gene located on these chromsones is considered sex linked.