Transcript Document

FOR ALL QUESTIONS – THESE ANSWERS APPLY
A – 25%
B – 50%
C – 75%
D – 100%
In dogs, there is a hereditary type of
deafness caused by a recessive gene.
Two dogs who carry the gene for
deafness but have normal hearing are
mated. What is the percent chance for
having a puppy who has normal
hearing?
In cabbage butterflies, White wings are
dominant to yellow wings. If a
heterozygous butterfly is crossed with a
homozygous recessive butterfly, what is
the chance they have offspring with
yellow wings?
• In guinea pigs, short hair is dominant
over long hair. If a short haired
homozygous dominant guinea pig is
crossed with a long haired homozygous
recessive guinea pig, what is the
chance they have offspring that are
heterozygous?
Can you curl your tongue up on the
sides? Tongue-curling in humans is a
dominant genetic trait. Suppose a man
who is heterozygous for tongue-curling
marries a woman who is also
heterozygous for this trait. What is the
chance they have a child who cannot
curl their tongue?
In guinea pigs, rough coats (with lots of
swirly cowlicks) are dominant over
smooth coats. If an homozygous
dominant guinea pig is crossed with a
heterozygous guinea pig, what are the
chance they have offspring with a rough
coat?
In pea plants purple is dominant to white. If you
cross two plants – both heterozygous for color
– what is the percent chance that they have
offspring who are white?
In pea plants purple is dominant to white. If you
have two parents, one is homozygous
recessive and the other is homozygous
dominant. How many of the offspring will be
purple?
In pea plants – tall is dominant to short. If you
have two parents – one heterozygous and the
other is short – what is the chance they have
tall offspring?
In dogs, there is a hereditary type of
deafness caused by a recessive gene.
Two dogs who carry the gene for deafness
but have normal hearing are mated. What
is the percent chance for having a puppy
who is deaf?
Tongue-curling in humans is a dominant
genetic trait. Suppose a man who is
homozygous for tongue-curling marries a
woman who is heterozygous for this trait.
What is the chance they have a child who
can curl their tongue?