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WorksheetsIntroduction to Genetics and Patterns of Inheritance
Total questions: 25
Worksheet time: 23mins
Which statement pertains to Mendel's law of segregation?
Two alleles for each trait separate during meiosis.
Homozygous organisms are called hybrids.
Dominant traits are visible.
Allele pairs are called a genotype.
Which of these pertains to Mendel's law of independent assortment?
observable characteristics of a trait
protein production
random distribution of alleles
separation of alleles during meiosis
An organism with the genotype DD for a trait is __. Select all that apply.
dominant
recessive
homozygous
heterozygous
Which statement is not true of genes located close together on the same chromosome?
They are linked together.
They do not segregate independently.
They travel together during gamete formation.
They always segregate independently.
Which of these statements is not true of inbreeding?
Desired traits can be passed to offspring.
Undesired traits can be eliminated.
Two closely related organisms are bred together.
Harmful recessive traits can never be passed to offspring.
A ___________ can determine an exact genotype.
test cross
hybridization process
phenotype
genome
Which statement is true of carriers? Select all that apply (there could be multiple possible correct answers).
They can pass a recessive disorder gene on to offspring.
They express the recessive trait.
They have one dominant allele.
They are heterozygous for a recessive disorder gene.
You and your colleagues are constructing a pedigree for a boy with cystic fibrosis. The individual’s younger brother has also been diagnosed with cystic fibrosis. How would these brothers be represented in a pedigree?
Both would be represented as completely shaded squares.
The older brother would be a shaded square, while the younger brother would be a half-shaded square.
Both would be represented as unshaded squares.
Both would be represented as completely shaded circles.
Traits controlled by genes on the X chromosome are called sex-linked traits. In what individuals are recessive sex-linked traits more commonly expressed?
females because they have two X chromosomes
males because they have only one X chromosome
females because they have no Y chromosome
males because they have a Y chromosome
Human blood groups are determined by ____________. Select all that apply (there could be more than one correct answer).
multiple alleles
codominance
incomplete dominance
single alleles
In the blood type Punnett square shown, what is the probability the offspring will inherit each blood type?
50% A, 25% B, 0% AB, 25% O
25% A, 50% B, 25% AB, 0% O
50% A and 50% B
25% AB, 50% A, 25% O
In the punnett square below, what belongs in the missing square
Which of the following genotypes is homozygous dominant?
aa
Aa
AA
Which of the following genotypes is heterozygous?
Bb
BB
bb
The different forms of a gene
alleles
atoms
proteins
wheels
This trait is hidden whenever the dominant allele is present
dominant allele
codominance
recessive allele
Punnett Square
This trait always shows up in an organism when the allele is present
dominant allele
codominance
probability
recessive allele
