chapter 14 quiz Flashcards

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1
Q

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

A

the location of an allele on a chromosome

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2
Q

which of the following is a homozygous genotype

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

A

aaBB

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3
Q

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

A

heterozygous

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4
Q

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

A

the garden pea

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5
Q

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

A

offspring genotypes

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6
Q

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

A

display the same phenotype as the RR parent

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7
Q

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

A

phenotypes

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8
Q

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

A

all tall

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9
Q

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

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

A

gametes

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10
Q

an individual with a genetic makeup of aaBB is called

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

A

pure breeding

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11
Q

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

A

Aa

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12
Q

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

A

codominance

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13
Q

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

A

multiple alleles

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14
Q

multiple effects of a single gene is

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

A

pleiotropy

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15
Q

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

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

A

homozygous

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16
Q

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

A

phenotype