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They have two copies of the genome
Only have one of each type of chromosome.
Where are diploid cells found?
Where are haploid cells found?
What are gamates?
The fertilized ovum is called a _________.
Is a zygote haploid or diploid?
A form of cell divison in which certain cells are set aside to give rise to haploid gamates.
________ have the same genes in the same order but may carry differnt alleles.
__________ helps to generate genetic diversity by mixing up parental traits.
mitosis has __ daughter cells per cycle.
meiosis has __ daughter cells per cycle.
The failure of homologous chromosomes to seperate properly during meiosis.
cell with an extra chromosome.
cell with one less chromosome
During which stage of meiosis does nondisjunction occur?
A Chromosome chart; photograph of chromosomes in meatphase.
How are karyotypes used?
- detect chromosomal abnormalities
- confirm a clinical diagnosis
- determine gender
- clarify evolutionary relationship
Who was the father of genetics?
Mendel chose to study_______ because...
- pea plants
- they were easy to cross pollinate
- easily distinguishable traits
The transmission of genetic characters from parents to offspring.
A unit of heredity composed DNA occupying a fixed position on a chromosome.
Alternate form of a gene
An organism's allele combination
Physical expression of the genes.
Two of the same alleles
ex: TT tt
Two differnt alleles
If present, this allele is present.
Masked by the dominant allele. May be expressed if paried with another recessive.
Contains genetic information neccessary to make proteins.
The basic building block of DNA is...
A nucleotide is composed of three parts:
- phosphate group
- nitrogen base
What are the four nitrogen bases found in DNA?
Who discovered the structure of DNA?
Watson and Crick
How does RNA differ from DNA?
________ base instead of thymine
________ instead of dexoyribose
Involved in the actual buliding of ________.
Amino acid "codes"