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WorksheetsPunnett Square Review
Total questions: 15
Worksheet time: 8mins
Steven and Anna have 2 daughters and 2 sons together. Both of their sons are colorblind, but non of their daughters are colorblind.
What can you determine about the genotypes of Steven and Anna?
Steven is XeY and Anna is XEXE
Stephen is XEY and Anna is XEXE
Stephen is XeYe and Anna is XEXe
Stephen is XEY and Anna is XeXe
A man with the genotype AO for blood marries a woman with the genotype BO. What are the chances that their child will have type A blood?
25%
50%
0%
5%
Identify the inheritance pattern:
A blue fish is crossed with a red fish and all of the offspring are purple.
Mendelian
Codominance
Incomplete Dominance
Sex-linked
What can be determined from the karyotype shown?
The person is a female
The person is a calico
The person has a mutation
The person is a male
State the phenotypes and ratios of a cross between two individuals with type AB blood.
Type A- 75%
Type B-75%
Type A-50%
Type B- 50%
Type A- 25%
Type AB- 50%
Type B- 25%
Type AB- 100%
A couple is expecting their first child. They have the alleles shown in the Punnett square for color-blindness.
What is the probability that they will have a color-blind daughter?
15%
25%
50%
0%
Down Syndrome is a genetic disorder caused when chromosomes do not divide equally during cell division, causing them to have an extra chromosome.
What genetic tool would be most useful in diagnosing Down Syndrome?
Karyotype
Pedigree
Punnett Square
Electrophoresis
Which inheritance pattern was studied by Mendel?
Sex-linked
Dominant and Recessive
Co-dominant
Incomplete Dominance
Which statement is not true regarding the transmission of sex-linked traits in a population?
Males inherit sex linked traits from their father.
Males can not be carriers for sex-linked traits.
Males can inherit an allele for a sex-linked trait from their mother
Males cannot pass alleles for sex-linked traits to their daughters.
What is an allele?
A different form of a particular gene, i.e. brown fur or white fur
Someone's name
A section of DNA that codes for a certain trait
Heterozygous
What can you tell about the inheritance pattern of the genetic trait shown on the pedigree?
The trait is recessive.
The trait is a disease.
The trait is dominant.
The trait is sex-linked.
What type of affect will deleting a single nucleotide have?
It will mutate the DNA and change the amino acid sequence.
The number of ribosomes will increase.
Transfer RNA will repair the nucleotide sequence.
The organism will grow an extra eye.
What inheritance pattern is shown?
Sex-linked
Codominance
Mendelian
Incomplete Dominance
Roan coat color is the result of codominance between red (R) and white (W). A red cow is crossed with a white bull. What percent of the offspring will be red?
18%
50%
100%
0%
In horses, chestnut and white alleles are codominant. Heterozygous horses express both genes equally, giving them a golden tan color as a result of the presence of both white and chestnut hairs.
In a cross between a homozygous chestnut horse and a heterozygous horse, what percent of offspring would be golden tan?
30%
50%
100%
25%
