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11 Cards in this Set

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What are the smallest segments of DNA that represent information
gene
Which scientists are credited with the discovery of the DNA double helix?
Crick and Watson
What are 3 ways that a DNA molecule has been described?
spiral staircase, twisted ladder, double helix
When DNA replicates itself, adenine always attaches to what base?
thymine
Cytosine, thymine, guanine, and adenine are made of what kind of bases?
nitrogen
A display of the pairs of chromosomes is known as what?
karyotype
How many chromosomes are in the nucleus of a human cell (other than the egg or sperm)?
46
Who made the first X-ray of a DNA molecule in 1952?
Rosalind Franklin
What does DNA stand for?
deoxyribonucleic acid
In every human being what percent of the genes are the same?
99%
To determine the sex of the human offspring, you need to look at what pair of chromosomes on a karyotype?
23rd pair