WorksheetsCochran Quizziz 2 Genetics
Total questions: 25
Worksheet time: 13mins
Two identical alleles for a trait is known as
homozygous
heterozygous
mutation
codominance
A physical appearance is
genotype
heterozygous
phenotype
codominance
A mutation is harmful to an organism if it
changes the phenotype of an organism
changes the DNA segment
reduces the organism's chance of survival
makes the organism better able to avoid predators
What does Pp mean?
two dominant alleles
heterozygous alleles
one dominant allele
two dominant and recessive alleles
Who studied different characteristics of pea plants by cross-pollinating plants?
Gregor Mendel
Albert Punnett
Sir Isaac Newton
David Kuster
What is the probability of producing a tall pea plant from a cross between two hybrid tall pea plants?
25%
50%
75%
100%
What does a Punnett Square determine?
all of Mendel's discoveries about genetic crosses
all the outcomes of a genetic cross
only the recessive allele combinations
only the dominant allele combinations
Genotype is
stem height
feather color
physical appearance
genetic makeup
The term that relates to physical characteristics that are studied in genetics.
traits
offspring
generations
hybrids
Factors that control traits are
purebreds
genes
recessives
parents
Scientists call an organism with two different alleles for a trait
factor
purebred
trait
hybrid
A mutation is
any change that is harmful
any change in a gene or chromosome
any change that is helpful
any change in the phenotype
An organisms's allele combination is known as
phenotype
mutation
hybrid
genotype
If a homozygous black cat (BB) is crossed with a homozygous white cat (bb), what is the probability of having a cat with white fur?
100%
0%
75%
25%
What does RR mean
two dominant alleles
heterozygous alleles
at least one dominant allele
one dominant and one recessive allele
A mother gives birth to a son, she then gives birth to a daughter. What is the likely hood that she will have another son?
75%
25%
50%
100%
Which trait can be influenced by both our DNA and our environment?
Having six fingers
Freckles
How tall we are
The colors of our eyes
How many Chromosomes do we inherit from our parents?
23 from dad and 23 from mom, or 46 total
13 from dad and 13 from mom, or 26 total
13 from dad and 33 from mom, or 46 total
What are chromosomes?
They are thread like structures containing DNA found inside the nucleus of our cells
They are X shaped blobs made of ribosomes
They are the inherited traits we recieve from our parents
They are types of alleles found in the mitochondria of a cell
The chemicals found in DNA are referred to as bases that are represented by the letters
QRTP
ABCD
DTPG
ACTG
Pigeons have Chromosomes.
True
False
Select the living organism that has DNA
Pigeons
Humans
Trees
All the other answers
Different forms of a single gene.
Genotype
Chromosome
Trait
Allele
When 2 different dominant traits are inherited and they are both expressed.
Incomplete Dominance
Co-Dominance
Recessive
Punnett Square
The trait that always appears in the offspring if it is present.
Dominant
Recessive
Hybrid
Incomplete Dominance
