WorksheetsEOC Review - Genetics
Total questions: 19
Worksheet time: 38mins
Hemophilia is a trait that is inherited, sex-linked and...
dominant.
recessive.
autosomal.
codominant.
Pollen is produced by the process of...
fertilization.
meiosis.
mitosis.
pollination.
All individuals have two alleles for a given trait. According to Mendel's ____________, these alleles are passed down one each from both mother and father.
Law of Segregation
Law of Independent Assortment
Law of Duel Alleles
Law of Independent Assortment
A pedigree chart like this one is characteristic of _________________ disorders.
dominant allelic
autosomal recessive
sex-linked dominant
sex-linked recessive
How many possible genotypes and phenotypes are there for a single gene trait that shows dominance in any given population?
One genotype, one phenotype
Two genotypes, two phenotypes
Two genotypes, three phenotypes
Three genotypes, two phenotypes
Which describes a trait from a recessive gene?
It causes a mutation.
It masks a dominant gene trait.
It can appear if it is heterozygous.
It usually appears only if it is homozygous.
Sea stars (starfish) can reproduce asexually by fragmentation if their arms are cut off, or sexually by releasing sperm and eggs into the water. Which of these is the major difference between asexual and sexual reproduction in sea stars?
The chromosome number is reduced in sea stars during asexual reproduction.
The number of chromosomes is increased in sea stars during sexual reproduction.
The appearance of the sea stars is changed as a result of asexual reproduction.
There is genetic variation in the sea stars as a result of sexual reproduction.
Organisms pass on their genetic information to offspring through sexual or asexual reproduction. Choose the correct pairing based on the picture.
A. Sexual B. Asexual
B. Sexual D. Asexual
A. Asexual D. Sexual
B. Asexual D. Asexual
Which of these BEST describes the primary goal of meiosis?
The nucleus is divided without mutation.
A single cell divides into two daughter cells.
All chromosomes are replicated and passed on to the daughter cells.
Daughter cells are produced with only half the chromosomes of the parent cell.
The characteristic indicated by the blackened figures is probably...
dominant.
recessive.
non-dominant.
sex-linked recessive.
What are the genotypes of the parents in this pedigree?
Both are homozygous dominant.
Both are homozygous recessive.
Both are heterozygous dominant.
The male is homozygous dominant and the female is homozygous recessive.
What is the genotype of individual II-2?
Homozygous dominant
Heterozygous
Homozygous recessive
In guinea pigs, black fur is dominant. If a black guinea pig is crossed with a white guinea pig and the litter contains a white offspring, the genotype of the black-haired parent is probably?
BB
Bb
B
bb
If a trait is inherited by an incomplete pattern of inheritance, the phenotype of the heterozygous individual will...
only express the dominant allele and mask the recessive allele.
express a blend/mix between the two other alleles.
express both of the other alleles fully.
only express the recessive allele and mask the dominant allele.
In snapdragons, flower color is controlled by incomplete dominance. The two alleles are red and white. The heterozygous genotype is expressed as pink. Cross a pink-flowered plant with a white-flowered plant. What is the probability of producing a pink-flowered plant?
25%
50%
75%
100%
If a trait is inherited by an codominant pattern of inheritance, the phenotype of the heterozygous individual will...
only express the dominant allele and mask the recessive allele.
express a blend/mix between the two other alleles.
express both of the other alleles fully.
only express the recessive allele and mask the dominant allele.
A person with type AB blood is crossed with a person with type O blood. What are the possible blood types that their offspring will have?
Type A and Type B
Types A, B, and AB
Type AB and Type O
Only Type AB
_______________ are more likely to be affected by an X-linked recessive disorder because ______________________.
Females; they only have one X chromosome
Females; they have two X chromosomes
Males; they only have one X chromosome
Males; they have two X chromosomes
Mendel's Law of Independent Assortment states that...
the alleles from the parent genotypes separate in a way that each offspring will end up with one allele from each parent.
a dominant allele will completely mask the expression of a recessive allele.
the alleles for different genes are not connected (one gene does not affect another).
