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13 Cards in this Set

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X- Chromosome
The longer chromosome. Females have two x chromosomes, males have one x chromosomes and one y chromosomes.
Y-chromosome
The shorter sex chromosome. Males have one x chromosome and one Y chromosomes
Genotype
Gene combination that determines phenotype.
Gamete
In organisms that reproduce sexually, one of the sex cells that unites with another to form a zygote.
Dominant
Stong for of agene which is expresses enen if a recessive gene is present
Mutation
A change in DNA or chromosomes can occur in body cells and sex cells. most mutation are not harmful.
Meiosis
Cell division that produces gametes or spores having one set of unpaired chromosomes.
Genetics
The study of inheritance
gene
a unit of genetic material that determines a trait.
Hybird
A geno type which is a combination of two different alleles for the same gene.
recessive
The weak form of a gene, which is not expressed when the dominant form is also present.
Phenotype
A trait that an organism actually shows.
Heredity
The passing of traits from parents to offspring.