chapter 14 quiz Flashcards
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
the location of an allele on a chromosome
which of the following is a homozygous genotype
a:AaBB
b:aABB
c:aaBB
d: aaBb
e:AaBb
aaBB
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
heterozygous
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
the garden pea
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
offspring genotypes
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
display the same phenotype as the RR parent
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
phenotypes
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
all tall
the theory of segregation applies most specifically to events occurring in preparation of
a:offspring
b:zygotes
c:homologous chromosomes
d:gametes
e:loci
gametes
an individual with a genetic makeup of aaBB is called
a: pure breeding
b:recessive
c:hybrid
d:dihybrid
e:heterozygous
pure breeding
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
Aa
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
codominance
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
multiple alleles
multiple effects of a single gene is
a:expressivity
b:penetrance
c:codominance
d:pleiotropy
e:multiple alleles
pleiotropy
four of the five choices listed below describe the heterozygous condition select the exception
a: homozygous
b:carrier
c:heterozygotes
d:hybrid
e: Aa
homozygous