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WorksheetsGrade 9 Genetics Assessment 2020
Total questions: 50
Worksheet time: 4hrs 10mins
What can you say about the results of the punnett square pictured?
It is guaranteed that 75% of the offspring from these 2 parent flowers will be purple
There will always be 1 white flower for every 3 purple flowers
The probability of an offspring with white flower is 25%
It is impossible that about half of the offspring will be white
Scientists refer to an organism that has 2 different alleles for a trait as a ________
Pure breed
hybrid
Dominant phenotype
Recessive phenotype
The set of observable characteristics of an individual as a result of interaction between their genetic information and the environment is an individual’s ____________
genotype
Allele frequency
genome
phenotype
When a cell is preparing to make a copy of itself, the DNA is neatly arranged in the form of ____________, otherwise the DNA is part of a disorganized “mess” called _______
chromosomes…….chromatin
protein…...cells
gene…...allele
chromatin……. chromosomes
In cats, ears that curl backwards is a recessive trait.
Two cats that are both heterozygous for normal ears are crossed. What percentage of the offspring can be expected to have normal ears?
0%
50%
25%
75%
In a certain plant, the alleles A, B, and C are dominant to the alleles a, b, and c. A plant with the genotype AABbcc will have the same phenotype as the plant with the genotype __________
Aabbcc
aabbcc
AaBBcc
AABBCc
In carrots the color is inherited according to incomplete dominance. There are homozygous purple carrots and homozygous orange carrots, but the heterozygous genotype produces a red carrot. What is the expected genotype ratio when a purple carrot is crossed with a red carrot?
The alleles can be represented with the following letters:
P = purple O = orange
PP : OO
2 : 2
PO : OO
2 : 2
PP : PO
2 : 2
PP : OO : PO
1 : 2. : 1
In guinea pigs, rough fur is completely dominant to smooth fur. What is the expected phenotype ration when two heterozygous guinea pigs are crossed?
smooth : rough
0 : 4
rough : smooth
3 : 1
rough : smooth
2 : 2
rough : smooth
1 : 3
In a particular species of gecko, black eyes are completely dominant to red eyes. When 2 geckos with black eyes are crossed, 40 offspring are produced. 11 have red eyes, and 29 have black eyes.
B = black eyes b = red eyes
What are the genotypes of the parents?
BB and Bb
bb and bb
Bb and Bb
BB and bb
Hemophilia is a disease carried by a recessive allele on the X-chromosome. Joanne and Phil are thinking about having children (neither of them have hemophilia), but Phil’s father had hemophilia and Joanne’s mother had hemophilia.
What are the chances of Phil and Joanne having a son with hemophilia?
0%
12.5%
75%
25%
If a section of DNA contains about 31% Guanine (G). Identify the amount of the other 3 bases.
Cytosine (C) = 31%
Adenine (A) = 31%
Thymine (T) = 31%
Cytosine (C) = 62%
Adenine (A) = 3.5%
Thymine (T) = 3.5%
Cytosine (C) = 31%
Adenine (A) = 19%
Thymine (T) = 19%
Cytosine (C) = 19%
Adenine (A) = 31%
Thymine (T) = 19%
Focal dermal hypoplasia is rare genetic disorder, and is a sex-linked, dominant disorder. A healthy woman plans on having children with a man who has the disorder. What are the chances of having a healthy child?
50%
0%
25%
100%
Consider the DNA sequence below:
TAC TCG AAT ACC ATC
Identify the complimentary strand of DNA
ACC TAT CCG AAA GAT
ATG CGT AAC TAA GCT
GCG ATG GCG CAA CTT
ATG AGC TTA TGG TAG
Consider the strand of DNA below:
TAC GGC TCG AAT ACC ATC
Identify the mRNA strand that corresponds to this strand of DNA.
ATG CCG AGC TTA TGG TAG
AUG CCG AGC UUA UGG UAG
AUG GCC ACA GUG CUU TAG
TAG TGG TTA AGC CCG ATG
Consider the strand of DNA below:
TAC GGC AAA GCT CAG ATT
Identify the corresponding amino acid sequence. (Use your own codon chart if the image isn't clear)
(use
met--leu--cys--cys--gly--STOP
met--pro--ile--arg--val--STOP
met--pro--phe--arg--val--glu
met--pro--phe--arg--val--STOP
Genotype refers to the ...
physical expression of the genes
the possible combination of alleles in a gene
when the dominant trait is expressed
how an organism will appear
Having two different genes for a trait (sometimes called hybrid).
protein
homozygous
heterozygous
genotype
Snapdragon flowers come in red, pink and white. What type of inheritance is this?
Complete Dominance
Incomplete Dominance
Codominance
Polygenic Inheritance
One version of a gene is called_______________
a DNA
a Phenotype
a trait
an allele
A pattern of inheritance where both alleles are expressed. (for example a roan cow has red hairs and white hairs)
codominance
incomplete dominance
multiple alleles
linked genes
What phase of mitosis is shown in the picture?
Prophase
Anaphase
Telophase
Metaphase
In the cell cycle, when does DNA replication take place?
cytokinesis
metaphase
interphase
anaphase
What structure is indicated by (b) ?
sister chromatid
chromosome
centromere
gene
The cells produced via meiosis are called:
gametes
somatic cells
body cells
skin cells
If a muscle cell in a koala bear contains 16 chromosomes, a koala sperm cell would contain
16
24
8
4
In DNA, cytosine always pairs with
Adenine
Thymine
Uracil
Guanine
What does the order of the Nitrogen Bases in DNA tell us?
the number of chromosomes present in an organism.
the traits that an organism will have
the gender of an organism.
whether an organism is abiotic or biotic.
The transfer of genetic info from DNA to mRNA is called
translation
transcription
initiation
elongation
Translation consists of which of the following?
creating a string of amino acids from a strand of messenger mRNA
conversion of genetic info from DNA to mRNA
addition of nucleotides to a DNA template
DNA replication
DNA molecule segment is : TTA CGC AAG
The mutated DNA segment is TTC GCA AG. This is an example of ___ mutation.
Substitution
Deletion
Insertion
Inversion
DNA molecule segment is : GAG-CTC-GAC-AGA
The mutated DNA segment is: GAG-CTC-CAC-AGA
This is an example of ___ mutation.
no mutation
substitution
insertion
deletion
Which nitrogenous base is not found in RNA?
Guanine (G)
Cytosine (C)
Adenine (A)
Thymine (T)
Keiko has heterozygous Type A blood, and her partner is heterozygous for type B blood. Which statement is true?
50% of Type A Blood and 50% Type O
Type A, Type B, Type AB, and Type O are all equally possible at 25% each
only Type A and Type B are possible, 50% each
Type A, Type B, and Type O are all equally possible at 33% each
California blackworms, also known as mudworms, are able to break apart. Each body section that broke apart is able to become an identical new worm. What type of reproduction does this example represent?
Sexual reproduction
Asexual reproduction
There are a couple thousand different species of brittle star. At certain times of the year, male and female stars release sperm and eggs into the ocean. They can also reproduce by simply splitting in half and grow new body parts. How does the organism reproduce?
Sexual reproduction
Asexual Reproduction
Both Asexual and Sexual reproduction
Can't reproduce
Which type of mutation occurs when there is an addition or removal of a base?
substitution mutation
silent mutation
frameshift mutation
point mutation
DNA molecule segment is : TTA CGC AAC CTA
The mutated DNA segment is TTC GCC ATC CTA
This is an example of a ___ mutation.
Substitution
nonsense
missense
deletion
This pedigree show what pattern of inheritance?
sex-linked dominant
Sex-linked recessive
incomplete dominance
co-dominance
The cell labeled "A" is in what phase of mitosis?
telophase
anaphase
prophase
metaphase
The cell labeled "E" in in what stage of mitosis?
anaphase
telophase
metaphase
prophase
The majority of cells in a mature plant or animal are not actively dividing.
What stage of the cell cycle are most of these cells in?
metaphase
hyperphase
interphase
cytokinesis
What part of the cell disappears during Prophase and reappears in Telophase?
nuclear membrane
cell membrane
cytoplasm
