quiz 1

Question 1

The location of a gene on a chromosome
is called the

Answer 1

locus

Question 2

If a gene is not on the sex chromosomes,
it is found on an

Answer 2

autosome

Question 4

a correct usage of phenotype and
genotype?

Answer 4

Two different genotypes may
produce the same phenotype

Question 5

What was the most significant conclusion
that Gregor Mendel drew from his
experiments with pea plants?

Answer 5

Traits are inherited in discrete units, and are not the results of blending

Question 6

What is the genetic cross between an individual showing a dominant phenotype (but of unknown genotype) and a
homozygous recessive individual called?

Answer 6

testcross

Question 7

the complete
complement of an organism’s genes

Answer 7

genome

Question 8

Which of the ff. statements about genes is
incorrect?

correct info about genes
a. genes correspond to segments of DNA
b. many genes contain information needed for cells to synthesize enzymes and other proteins
c. during fertilization, both sperm and the ovum contribute genes to the resulting fertilised egg

INCORRECT
d. under normal circumstances, each
chromosome contains precisely one gene

Question 9

How do the 2 members of a pair of
homologous chromosomes differ from each
other?

Answer 9

the precise sequence of the DNA
within each of the chromosomes

Question 10

. By examining a karyotype, it is possible to determine the

Answer 10

sex

Question 11

He confirmed the chromosome theory of inheritance with his discovery of sex chromosomes in fruit flies

Answer 11

Thomas Hunt
Morgan

Question 12

According to the Theory of Pangenesis

Answer 12

all
tissues in the body produce heritable
materials

Question 13

In Griffth’s experiment, which of the ff. strains of pneumococci was isolated from the dead S bacteria and live R bacteria?

Answer 13

live smooth strain

Question 14

Avery, MacLeod and Mc Carty expanded
on Griffth’s work and demonstrated that DNA was the molecule used by bacteria to pass info. on. What would their results have
been if protein was the hereditary material?

answer:
Only the samples treated with DNase and RNase would cause transformation

Question 15

Which experimenter disproved the
classical theory of blending inheritance?

Answer 15

Gregor Mendel

Question 16

epigenetic inheritance

a. it can be reset during gametogenesis
c. does not involve a change in DNA sequence

false statement
b. can temporarily affect an individual

Question 17

Single gene producing two or more
effects

Answer 17

Pleiotropy

Question 18

Refers to the proportion of people w/ a particular genotype who exhibits the corresponding phenotypic characteristics

Answer 18

Penetrance

Question 19

. A characteristic of a certain gene having no allelic counterpart

Answer 19

Hemizygous

Question 20

A characteristic that is influenced by two
or more genes

Answer 20

polygenic

Question 21

The mating of an F1 progeny with its
homozygous recessive parents

Answer 21

Backcross

Question 22

Individual organism which forms two kinds of gametes determines sex of the offspring

Answer 22

Heterogametic

Question 23

The genetic makeup of an organism

Answer 23

The genetic makeup of an organism

Question 24

The Nobel prize winner for inventing the PCR

Answer 24

Kary Mullis

Question 25

Two identical copies of a chromosome formed by replication

Answer 25

Sister chromatids

Question 26

The degree to which trait expression differs among individuals

Answer 26

Expressivity

Question 27

determined by genes located on autosomes and expressed only in one sex

Answer 27

Sex-limited inheritance

Question 28

Refers to the mobile genetic elements

Answer 28

Transposons

Question 29

An organism or cell whose genome has been altered by the interaction of one or more foreign DNA sequences from another species by artificial means

Answer 29

Transgenic

Question 30

He coined the word gene

Answer 30

Wilhelm Johannsen

Question 31

Chromosomes that contain the same genes in the same order along their chromosomal arms inherited from each parent

Answer 31

Homologous chromosomes

Question 32

Organism that always pass down a certain phenotypic trait

Answer 32

Homozygous/True breeding

Question 33

Gene interactions where one gene is capable of interfering w/ the expression of another

Answer 33

Epistasis

Question 34

A heritable change in the nucleotide sequence of an organism’s DNA

Answer 34

Mutation

Question 35

He proposed the theory of inheritance of the acquired characteristics

Answer 35

Jean-Baptiste Lamarck

Question 36

He proposed the central dogma

Answer 36

Francis Crick

Question 37

CRISPR stands for

Answer 37

"Clustered Regularly Interspaced Short Palindromic Repeats

Question 38

" It's a revolutionary gene-editing technology that allows scientists to precisely and easily modify the DNA of organisms, including humans.

Answer 38

CRISPR