Genetics2014-15

1.

1 point

Where does an organism get its unique characteristics?

An individual’s characteristics are determined by factors that arise spontaneously with each new generation

An individual’s characteristics are determined by factors that are passed on from one parent, such as the mother or the father, only.

From a catalog.

An individual’s characteristics are determined by factors that are passed from one parental generation to the next.

2.

1 point

In what way is DNA like a book?

DNA has information wrapped in an identifying cover.

DNA has information that is periodically updated.

DNA has information organized with an kind of index.

DNA has stored information, that can be copied and passed on.

3.

1 point

In messenger RNA, each codon specifies a particular

nucleotide

promoter

enzyme

amino acid

4.

1 point

Which of the following is a nucleotide found in DNA?

deoxyribose + phosphate group + cytosine

cytosine + phosphate group + guanine

adenine + phosphate group + thymine

deoxyribose + phosphate group + polymerase

5.

1 point

The different forms of a gene are called

alleles.

pollinations.

hybrids.

traits.

6.

1 point

In rabbits, there are four different versions of the gene for coat color. What pattern of inheritance is this?

multiple alleles.

polygenic inheritance.

codominance.

incomplete dominance.

7.

1 point

DNA replication results in two DNA molecules,

one with two new strands and the other with two original strands.

each with one new strand and one original strand.

each with two original strands.

each with two new strands.

8.

1 point

Which of the following forms a base pair with thymine?

adenine

cytosine

guanine

deoxyribose

9.

1 point

When a chromosome undergoes a deletion mutation, information is

reversed.

lost.

repeated.

transferred.

10.

1 point

What determines the color of western white butterflies?

temperature and genes

genes alone.

exposure to sunlight and genes

the environment alone

11.

1 point

RNA contains the sugar

lactose.

ribose.

deoxyribose.

glucose.

12.

1 point

What molecule in a cell stores genetic information?

carbohydrates

proteins

DNA

lipids

13.

1 point

Gregor Mendel’s principles of genetics apply to

animals only.

plants only.

all organisms.

pea plants only.

14.

1 point

Which type of RNA brings the information in the genetic code from the nucleus to other parts of the cell?

rRNA

tRNA

mRNA

RNA polymerase

15.

1 point

Gregor Mendel removed the male parts from the flowers of some plants in order to

prevent hybrids from forming.

stimulate self-pollination.

control crosses between plants.

prevent cross-pollination.

16.

1 point

The principles of probability can be used to

determine which species should be used in genetic crosses.

predict the traits of the offspring of genetic crosses.

decide which organisms are best to use in genetic crosses.

determine the actual outcomes of genetic crosses.

17.

1 point

What happens during translation?

Transfer RNA is made from a messenger RNA code.

The cell uses a messenger RNA code to make proteins.

Messenger RNA is made from a DNA code.

Copies of DNA molecules are made.

18.

1 point

What is produced during transcription?

proteins

RNA molecules

DNA molecules

RNA polymerase

19.

1 point

In eukaryotes, DNA

floats freely in the cytoplasm.

is located in the nucleus.

is located in the ribosomes.

is circular.

20.

1 point

The two “backbones” or “rails” of the DNA molecule consist of

Phosphates and sugars

Thymines and sugars

Adenines and thymines

Adenines and sugars

21.

1 point

Unlike DNA, RNA contains

thymine.

adenine.

uracil.

phosphate groups.

22.

1 point

Roan cattle show codominance for the color of their hair. There are alleles for red hair and white hair. What would you expect a heterozygous roan bull to look like if the trait showed incomplete dominance instead?

It would be spotted.

It would be white.

It would be red.

It would be pink.

23.

1 point

The scientific study of heredity - the transmission of traits from parents to offspring - is known as

genetics

hereditology

genomics

an evening to celebrate

24.

1 point

Organisms that have two identical alleles for a particular trait are said to be

dominant.

heterozygous.

hybrid.

homozygous.

25.

1 point

During DNA replication, a DNA strand that has the bases CTAGGT produces a strand with the bases

GAUCCA.

GATCCA.

AGCTTG.

TCGAAC.

26.

1 point

The physical characteristics of an organism are called its

Phenotype

Genotype

Heredity

Genetics

27.

1 point

Because of base pairing in DNA, the percentage of

adenine molecules in DNA is about equal to the percentage of guanine molecules.

thymine molecules in DNA is about equal to the percentage of adenine molecules

adenine molecules in DNA is much greater than the percentage of thymine molecules.

cytosine molecules in DNA is much greater than the percentage of guanine molecules.

28.

1 point

If a pea plant’s alleles for height are tt, what is true of its parents?

Both parents were short.

Both parents contributed a recessive allele.

Both parents were tall.

Both parents contributed a dominant allele.