WorksheetsReviewing Punnett Squares and Pedigrees
Total questions: 20
Worksheet time: 52mins
Why do all the daughters in Generation II carry the colorblind gene?
Because mom passed on the mutated allele.
Because dad passed on the X chromosome with the mutated allele.
Because their brother has the mutated allele.
Because dad passed on the Y chromosome with the mutated allele.
This pedigree shows the inheritance of a certain trait in a group of related people. Is the trait dominant or recessive?
dominant
recessive
While observing a litter of guinea pigs, Jack and Jill noticed that they had a variety of brown and white coats. They knew the guinea pigs had the same parents and that they were all from the same litter. Which best explains why they had different coat colors?
they received an exact copy of both parents' DNA
they randomly received DNA from only one parent
the coat color is random and not influenced by parents
they received different combinations of DNA from both parents
Which of the following correctly states the genotype probabilities for the offspring of the parents shown in this punnett square?
50% heterozygous 50% homozygous dominant
50% heterozygous 50% homozygous recessive
50% heterozygous 25% homozygous recessive 25% homozygous dominant
100% heterozygous
Which of the following correctly states the genotype probabilities for the offspring of the parents shown in this punnett square?
50% heterozygous 50% homozygous dominant
50% heterozygous 50% homozygous recessive
50% heterozygous 25% homozygous recessive 25% homozygous dominant
100% heterozygous
Julie learned that curly hair is dominant over straight hair. She began to wonder if two parents with curly hair could produce offspring with straight hair. Which of the following punnett squares shows curly haired parents that can produce offspring with straight hair?
How many alleles (letters) does a child get from each parent?
1
2
3
4
If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?
HH
Hh
hh
XhY
