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WorksheetsSTAAR Review Day 2 - Genetics
Total questions: 10
Worksheet time: 10mins
A segment of DNA strand is shown:
3' A G G T C A G G T 5'
Which of these is the correct complementary DNA strand for the segment shown?
5' A G G T C A G G T 3'
5' A C C U G A G G U 3'
5' T G G A C T G G A 3'
5' T C C A G T C C A 3'
What part of the DNA molecule is responsible for the direct coding of specific traits/characteristics in an organism?
The number of hydrogen bonds
The sequence of the bases (ATCG)
The sequence of the phosphates
The number of carbons
Students are modeling mRNA during the process of protein synthesis. Which answer correctly describes the model of mRNA being transcribed (DNA -> RNA) (HINT: What base is found in RNA and not DNA)
RNA is complementary to DNA, however, uracil (U) instead of adenine (A) is bonded to thymine (T) = U-T
RNA is complementary to DNA, however, uracil (U) instead of thymine (T) is bonded to adenine (A) = U-A
RNA is the exact copy of DNA, however, uracil (U) instead of adenine (A) is bonded to thymine (T) = U-T
RNA is the exact copy of DNA, however, uracil (U) instead of thymine (T) is bonded to adenine (A) = U-A
CRISPER-CAS9 is a genetic modification technique that edits parts of the genome of an organism. Using this technique scientists can add, remove, modify (turn off/on) sections of DNA.
How can scientists use this technique to control gene expression (what genes are on or off)?
By calculating the number of genes different organisms produce
By activating or deactivating specific genes
By identifying how closely related one organism is to another
By determining the number of chromosomes in an organism
The model shows a mutation to a partial sequence of bases (ATCG) in a gene (DNA).
Which type of mutation does the model demonstrate?
Deletion
Insertion
Substitution
Translocation
Exposure to the building material asbestos has been linked to certain types of cancers. Asbestos causes mutations in the p53 gene (DNA), which controls tumor suppression.
Which statement best explains why people with cancer due to asbestos exposure do not pass the mutation on to their offspring?
The mutation occurred in a gametic (sex) cell
The mutation occurred in a somatic (body) cell
The mutation is recessive
The mutation is sex-linked
What is the probability of albinism in the offspring of a cross between two mice with AaBb (heterozygous) alleles?
1/16
3/16
4/16
9/16
The inheritance pattern for an autosomal dominant trait is shown in the pedigree. Shaded symbols represent individuals that express the dominant trait.
Based on the pedigree, what are the most likely genotypes of individuals I-1 and 1-2?
I-1: aa
I-2: Aa
I-1: AA
I-2: Aa
I-1: Aa
I-2: aa
I-1: aa
I-2: AA
Which statement about the event (crossing over/meiosis) represented in the diagram is valid?
The event represents RNA translation in the smooth endoplasmic reticulum
The event takes place in bacterial cells
The event produces genetic diversity in eukaryote cells
The event produces genetically identical daughter cells
Gametes (egg and sperm) produced by an organism contain a combination of genes from that organism. In every gamete, this combination is -
the same because it is created from the same DNA
the same because chromosomes are copied prior to meiosis
different due to DNA replication prior to mitosis
different due to independent assortment and crossing over during meiosis
