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WorksheetsU4 STUDY GUIDE CH1-5
Total questions: 14
Worksheet time: 7mins
Is the long-haired cat in the P generation a hybrid or a purebred? Explain your answer.
It is a purebred because it has two recessive alleles for long hair. If it were a hybrid, it would have both the dominant and recessive allele and have short hair because the dominant allele always masks the recessive allele.
It is a purebred because it has two dominant alleles for long hair. If it were a hybrid, it would have both recessive allele and have short hair because the dominant allele always masks the recessive allele.
It is a hybrid because it has two recessive alleles for long hair. If it were a purebred, it would have both the dominant and recessive allele and have short hair because the dominant allele always masks the recessive allele.
It is a hybrid because it has two dominant alleles for long hair. If it were a purebred, it would have both recessive allele and have short hair because the dominant allele always masks the recessive allele.
If the short-haired cat in the P generation were purebred, what would you expect the offspring to look like?
One offspring would have short hair and three offspring would have long hair.
Two offspring would have short hair and two offspring would have long hair.
All offspring would have long hair.
All offspring would have short hair.
In guinea pigs, the allele for a smooth coat (S) is dominant over the allele for a rough coat (s). What would be the alleles for a purebred rough coat guinea pig?
SS
Ss
ss
sS
A seed can be round or wrinkled. Seed shape is____.
a factor
an allele
a trait
a gene
In one classic experiment, Mendel crossed two purebred pea plants, one tall and one short. In the first generation offspring (F1), all of the plants were tall. When these F1 plants were crossed, what would Mendel find?
All of the plants were tall.
All of the plants were short.
Some of the plants were medium-sized.
Some of the plants were short, and some were tall.
A couple has three brown-eyed children. The parents are brown-eyed (Bb). The allele for brown eyes is dominant over the allele for blue eyes. They believe the fourth child they have will be blue-eyed.
Which statement below explains what actually will happen?
The couple will have a blue-eyed fourth child.
The couple will have a brown-eyed fourth child.
The couple has a 25 percent chance of having a blue-eyed child.
The couple has a 75 percent chance of having a blue-eyed child.
Which of the following best describes heredity?
Some genes help an individual survive in their environment.
Individuals have different genes.
Parents pass on their traits to their children through genes.
Random changes can alter the information a gene contains.
If the allele for white flowers is dominant and the allele for purple flowers is recessive, what is the phenotype of the offspring in the F1 generation?
purple
white
WW
Ww
In the Punnett square for the F2 generation, what percentage of the offspring are purple?
25 percent
50 percent
75 percent
100 percent
Which of the following is an example of how environmental factors can affect the expression of genes?
vocal cords allow human speech
hair dye affects hair color
exercise increases muscle size
contact lenses change eye color
Examine the pedigree above. Which of the following statements best fits the data?
If parents do not match on the trait, the children will all have widow’s peak
If parents do not match on the widow's peak trait, the children will all have no widow's peak
Two parents with no widow’s peak only have children with no widow’s peak
Two parents with widow’s peaks only have widow’s peak children
Kioshi and Raidon are brothers. Both of their parents have brown eyes. Kioshi also has brown eyes but Raidon’s eyes are grey. Which of the following explains why the brothers have different eye color?
Parents who both have brown eyes always have at least one offspring with grey eyes
Offspring from the same parents always inherit the same traits
Eye color is not an inherited trait
Sometimes an offspring can show a variation of a trait that neither parent has
A dominant allele ______.
is written with a lowercase letter
masks a recessive allele
none of these
is always the most common allele
all of these
If allele 'A' is dominant to allele 'a', which genotype would the dominant trait be expressed?
Aa
AA
aa
AA and Aa
AA and aa
