chapter 14 quiz

Question 1

a gene locus is

a: a recessive gene
b: an unmatched allele
c: a sex chromosome
d:the location of an allele on a chromosome
e: a dominant gene

Answer 1

the location of an allele on a chromosome

Question 2

which of the following is a homozygous genotype

a:AaBB
b:aABB
c:aaBB
d: aaBb
e:AaBb

Answer 2

aaBB

Question 3

the most accurate description of an organism with genotype AaBb is

a: homozygous dominant
b:heterozygous
c:heterozygous dominant
d:homozygous recessive
e:heterozygous recessive

Answer 3

heterozygous

Question 4

which organism did mendel utilize to work out the laws of segregation and independent assortment?

a:the fruit fly
n:the rose
c:the garden pea
d:the chicken
e: e coli

Answer 4

the garden pea

Question 5

in a punnett square the letters within the little boxes represent

a:offspring genotypes
b:parental genotypes
c: gametes
d:offspring phenotypes
e:parental phenotypes

Answer 5

offspring genotypes

Question 6

if R is dominant to r, the offspring of the cross of RR with rr will:

a: be homozygous
b:display the same phenotype as the RR parent
c:display the same phenotype as the rr parent
d:have the same genotype as the RR parent
e: have the same genotype as the rr parent

Answer 6

display the same phenotype as the RR parent

Question 7

If short hair (L) is dominant to long hair (l) animals LL and Ll have the same:

a:parents
b:genotypes
c:phenotypes
d:alleles
e:genes

Answer 7

phenotypes

Question 8

if tall D is dominant to dwarf d, and two homozygous varieties DD and dd are crossed then what kind of progeny will be produced

a:all intermediate forms
b:all tall
c:all dwarf
d:1/2 tall, 1/2 dwarf
e: 3/4 tall, 1/4 dwarf

Answer 8

all tall

Question 9

the theory of segregation applies most specifically to events occurring in preparation of

a:offspring
b:zygotes
c:homologous chromosomes
d:gametes
e:loci

Answer 9

gametes

Question 10

an individual with a genetic makeup of aaBB is called

a: pure breeding
b:recessive
c:hybrid
d:dihybrid
e:heterozygous

Answer 10

pure breeding

Question 11

all except for which of these genotypes is a possible F1 gamete for a dihybrid cross between AADD with aabb?

a:Aa
b:Ab
c:AB
d:aB
e:ab

Answer 11

Aa

Question 12

in ___ a pair of nonidentical alleles affecting two phenotypes for a given trait is both expressed at the same time in heterozygotes

a:pleiotropy
b:polygenic inheritance
c:complete dominance
d:codominance
e: a multiple allele system

Answer 12

codominance

Question 13

blood types (a b and o) are controlled by

a:sex linked genes
b:linked genes
c:incompletely dominant genes
d:multiple alleles
e:none of these

Answer 13

multiple alleles

Question 14

multiple effects of a single gene is

a:expressivity
b:penetrance
c:codominance
d:pleiotropy
e:multiple alleles

Answer 14

pleiotropy

Question 15

four of the five choices listed below describe the heterozygous condition select the exception

a: homozygous
b:carrier
c:heterozygotes
d:hybrid
e: Aa

Answer 15

homozygous

Question 16

four of the five choices listed below describe the gene makeup select the exception

a: pure breeding
b:homozygous
c:heterozygrous
d:carrier
e:phenotype

Answer 16

phenotype