Question: When the first filial generations (F1) of a
monohybrid cross are allowed to self-fertilize, the
p…
When the first filial generations (F1) of a
monohybrid cross are allowed to self-fertilize, the
phenotypic ratio of the progeny (F2) should
be
a.3:1.
b.9:3:3:1.
c.1:2:1.
d.1:1:1:1.
e.1:1
In guinea pigs, black coat color (B) is dominant to white (b). A
black guinea pig was mated to a white guinea pig and over several
years produced 38 black offspring. The most likely genotypes for
the parents are
a.bb and bb
b.BB and BB
c.Bb and bb
d.Bb and Bb
e.BB and bb
In humans, normal pigmentation is dominant; albino is recessive.
If a normal man marries an albino woman and they have a normal boy
and an albino girl, we can safely conclude that
a.both parents are heterozygous.
b.the man is heterozygous.
c.albino is sex-linked.
d.both parents are homozygous.
e.The man has the genotype for albino pigmentation but the
phenotype for normal pigmentation.
Full pod shape (F) is dominant to constricted pod shape (f), and
yellow pod color (Y) is dominant to green pod color (y) in pea
plants. A pure-breeding green plant with full pods is crossed with
a pure-breeding yellow plant with constricted pods. What will be
the phenotype of the offspring?
a.all green with a full pod
b.all yellow with a constricted pod
c.all yellow with a full pod
d.all green with a constricted pod half green with a constricted
pod, half yellow with a full pod
