The frequency of crossing over decreases with the distance separating genes on a chromosome.

Codominant alleles are expressed equally.

Under normal rules of dominance, if 2 different alleles are present, the dominant allele is expressed.

Crossing Over is one of the sources of genetic variation.

A mutagen is a substance that causes a change in DNA.

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Mitosis is a kind of cell division that produces the sex cells, the egg and the sperm.

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In DNA, the base Adenine (A) pairs with Guanine (G).

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In humans, sex is determined by the autosomes.

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An organism that has the genetic makeup of Tt is said to be homozygous.

A DNA nucleotide does not contain

Human blood type is determined by

People who carry genetic disorders (carriers) are

A method to trace the inheritance of a trait over many generations is called a

The insertion or deletion of a single base pair of DNA results in a

Gregor Mendel called the generation created by crossbreeding the parental generation the

A recessive trait is expressed only in an individual who is

A tall pea plant (TT) and a tall pea plant (Tt) have the same

The failure of homologous chromosomes to separate properly during meiosis is called

Watson and Crick’s model of DNA replication is called

Pea plants usually reproduce by

The pairs of alleles in an organism’s genetic makeup are called its

a) Phenotype

b) Genotype

c) Parental type

d) Filial type

The concept that a random distribution of alleles occurs during gamete formation is the

At the end of mitosis, how may haploid cells are there?

At the end of meiosis II, how many haploid cells are there?

The cross TtPp x TtPp is a

The diploid number of chromosomes in humans is

A micrograph that contains pairs of homologous chromosomes arranged in decreasing size is called a

A cross between two plants produces 100 offspring. Of the offspring, 75 have flat

leaves and 25 have curled leaves. What is the ratio of flat leaves to curled leaves?

A cross between two plants produces 100 offspring. Of the offspring, 75 have flat leaves and 25 have curled leaves. What is the probability that any given

offspring will have flat leaves?

A person with an XO sex chromosome combination is a

What substance picks up amino acids and carries them to the ribosomes?

What substance carries information from the nucleus to the cytoplasm?

What substance associates with proteins to form ribosomes in the cytoplasm?

Breeding 2 closely related organisms to have a desired traits is called

Some bacteria contain proteins that cut DNA molecules at a specific DNA base sequences. These are called

The total DNA present in the nucleus of each cell of an organism is its

Who took Photo 51, which revealed that DNA could be a double helix?

Who discovered that DNA was the transforming factor for bacteria?

Who discovered that one strain of bacteria could be transformed into another?

Who developed what was known as the “one gene-one enzyme” hypothesis (now the “one gene-one polypeptide” hypothesis)?

Who discovered the basic structure of DNA nucleotides?

Who discovered the structure of DNA.?

Who discovered that the amount of A was equal to the amount of T and that the amount of C was equal to the amount of G in any given species’ DNA?

Who discovered the polymerase chain reaction (PCR)?

Who used radioactively labeled sulfur and phosphorus to trace DNA and protein?