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WorksheetsGenetics and Heredity Review
Total questions: 60
Worksheet time: 2hrs 3mins
Heredity is the passing of traits from _____________________ to _____________________.
predators to prey
water to rain
parents to offspring
ratio
trait
probability
Which trait is always expressed (SEEN/Wins)
recessive trait
aggressive trait
absent trait
dominant trait
Match the following.
DNA
Chromosome
Gene
blue jeans
genes
pedigree
_____________________ is the physical appearance of an organism, or how it looks. Examples: brown hair, height and shape of face.
phenotype
ratio
heredity
The genetic material is found in the ____________ of the cell.
cytoplasm
nucleus
mitochondria
The genetic material found in the cell is called:
chromosomes, DNA
sperm and egg
fertlization, pollination
Which of the following is NOT an inherited trait?
rolling your tongue
freckles
height
learning a new language
Which eye color is dominant?
blue eyes
brown eyes
Traits such as eye color and height are passed on from parents to offspring through:
learned behaviors when born
genetic material called DNA
electrical signals from nervous system
Which of the following is NOT an inherited trait?
Mother and daughter having the same eye color
Father teaching his son to cook
Father and son being the same height
Which of the following is an INHERITED TRAIT?
Father teaching his son to ride a bike
Mother teaching her son a new language
Daughter has green eyes like her father
Genetic material located on chromosomes that determine traits are called?
(a)
Reorder the following from Largest to Smallest.
Cell
Nucleus
Chromosome
DNA
Gene
The following organisms are a result of ______________ reproduction.
asexual
sexual
The term diverse means?
different/variety
same
simple
What do we use to calculate the probability of an offspring's genotype?
Punnett square
Venn diagram
Golden ratio
Fibonacci sequence
When the two genes of an allele are different, we refer to that genotype as
heterozygous
homozygous
Phenotype refers to the _________ of an individual
genetic makeup
physical appearance
Which of these would best be described as a phenotype?
blue eyes
mutation
Bb
Tt
Yes, they are caused by toxic chemicals and radiation
No, all mutations are beneficial
No, some can be useful in a changing environment
An organism's phenotype describes its __________.
genetic makeup
physical appearance
chromosome
gene
DNA
TT is
heterozygous
homozygous
Tt is
heterozygous
homozygous
tt is
heterozygous
homozygous
Who discovered that tallness is a dominant trait in pea plants?
Gregor Medel
James Watson
Charles Darwin
This table shows the number of chromosomes found in different organisms. Why do all of them have an EVEN number of chromosomes?
Organisms are made up of an even number of cells
Organisms get half their chromosomes from each parent
A chromosome is made of one long molecule that is shaped like a twisted ladder, called DNA. A segment of DNA is a gene.
True
False
Diagrams are often not drawn to size. What is the correct sequence of structures from smaller to largest?
Gene, DNA, Chromosome, Nucleus, Cell
DNA, Chromosome, Cell, Gene, Nucleus
A mistake during DNA replication (when it makes a copy of itself) is a ___________.
Examples of this include cancer, albino skin, and tow different colored eyes.
mutation
dominant gene
recessive gene
If an organism with small ears mated with an organism with large ears, and all the offspring had small ears, that would most likely mean
small ears are dominant
large ears are dominant
Genotype
Phenotype
Dominant alleles are represented by a:
lowercase letter
capital letter
Your DNA is the same as your siblings.
Your set of DNA is identical to your mothers.
Your DNA is unique to you.
ribosomes
nucleus
hidden allele
dominant allele
recessive allele
The child or product of reproduction by plants, animals, and all other living things.
gene
offspring
trait
One of the different forms of a single gene, either dominant or recessive.
Allele
Chromosome
A section of DNA that codes for a specific protein.
gene
chromosome
phenotype
This Austrian monk is known as the Father of Modern Genetics.
Albert Einstein
Gregor Mendel
Charles Darwin
When both alleles of a genotype are the same. (either RR or rr)
homozygous
heterozygous
When both alleles of a genotype are different. (example: Rr)
homozygous
heterozygous
The molecular instructions for building all living organisms.
cells
DNA
nucleus
The study of heredity and the variation of inherited characteristics.
physics
geology
genetics
Illnesses or disorders caused by an abnormal gene. (Examples: Downs and Turner Syndrome -wrong number of chromosomes, Recessive traits - Sickle Cell Anemia, Cystic Fibrosis)
Mutation
Genetic Disorder
Long strands of DNA that contain thousands of genes.
Genes
DNA
Chromosomes
Someone who has one recessive allele for a trait but doesn’t show it.
Mutant
Carrier
23 pairs or 46 chromosomes
Number of human chromosomes in each cell
Number of letters in the alphabet
Number of days in the month of February
The allele combination for a trait (ie. Bb or bb.)
Genotype
Phenotype
When a chromosome is not copied correctly.
Twins
Genetic Disorder
Mutation
The likelihood that an event will occur.
Probability
Ratio
A chart that shows all possible combinations of alleles between two organisms.
Punnett Square
Pedigree
Human chromosomes that determine gender.
C and D
X and Y
A and B
A characteristic caused by genetics or the environment.
Allele
Trait
Gene
Segment of DNA
genes
genetics
mutation
How many pairs of chromosomes do humans have?
23
24
25
