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Flashcards in Ch. 3 Questions Deck (22)
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1

Biological traits are controlled by individual factors, rather than by a single hereditary agent. This idea is referred to as

Particulate inheritance

2

The genetic code is a set of instructions for the production or synthesis of

Proteins

3

The portion of the genome that codes for a protein is called a(n)

Gene

4

______ are responsible for a cell's chemical reactions.

Enzymes

5

What are the correct pairings of the four bases found in DNA?

A-T, T-A, C-G, G-C

6

Most traits of complex organisms are

Polygenic

7

The AB blood type is produces by

Two codominant alleles

8

Mitosis is

The process of cell division that results in two copies of the original cell

9

"Junk DNA" is thought to

Regulate gene function and activity level

10

How many chromosomes in total do humans have?

46 or 23 pairs

11

The formation of gametes is called

Meiosis

12

The human genome is approximately how many base pairs long?

3.1 billion

13

Proteins are the basic building blocks of an organism's cell

True

14

Genetic code is found in the nucleus of cells

True

15

If the sequence of bases on one side of a DNA helix is known, then the sequence on the other side can be correctly predicted.

True

16

A codon consists of a four-base sequence that codes for a specific amino acid

False

17

A person with a pair of non-matching alleles is considered to be homozygotic

False

18

Dominant alleles are better than recessive alleles

False

19

Sperm is an example of a gamete

True

20

Different versions of a single gene are called alleles

True

21

Over 90% of the human genome are non-coding genes

True

22

If your mother is homozygous dominant for PTC tasting and your father is homozygous recessive for PTC tasting, then you have 100% chance of being able to taste PTC

True, assuming it is a dominant trait