a long molecule composed of building blocks called nucleotides.
where DNA is found in a cell
functions of DNA
store & transmit genetic information and to direct the synthesis of proteins
a twisted ladder or spiral staircase made up of DNA
S phase of Interphase
Replication occurs as cells prepare to divide
each newly created strand is ½ old DNA and ½ new DNA.
any permanent change in a DNA sequence
an extra base is inserted into the DNA or when a base is mistakenly left out
the process by which body cells divide to produce 2 new cells
the original cell
the 2 new cells produced
a series of events cells go through as they grow and divide
a period of cell growth and development
division of the nucleus into 2 nuclei, each with the same number of chromosomes
the division of the rest of the cell (cytoplasm and organelles) after the nucleus divides during mitosis
the transmission of traits from one generation to the next
hereditary units that carry coded information
a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells
chromosome pairs of the same length, centromere position, staining pattern, and gene possession for the same characters
goal of meiosis
reduce the number of chromosomes from a diploid number to a haploid number in preparation for sexual reproduction
A display of the chromosome pairs of a cell arranged by size and shape.
any alteration in the structure or function of an organism or any of its parts that results from natural selection and by which the organism becomes better fitted to survive and multiply in its environment
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