WorksheetsHeredity Quiz
Total questions: 23
Worksheet time: 8mins
Different forms of a gene are called
traits
factors
alleles
You can determine a cow's phenotype by
looking at the cow's parents
examining the cow's chromosomes
looking at the cow
What does BB mean to a geneticist?
heterozygous alleles
two dominant alleles
one dominant and one recessive allele
What does Bb mean to a geneticist?
homozygous alleles
two recessive alleles
one dominant and one recessive allele
A gene from one organism inserted into the DNA of another organism is called
genetic engineering
DNA Doubling
hybridization
A dominant allele 'hides' a _____________ allele.
weak
heterozygous
recessive
The name for an organism that has two different alleles for a trait is called a
trait
hybrid
purebred
On a pedigree chart, a female is represented by
circle
square
XY
The factors that control traits are called
genes
recessives
purebreds
Two identical alleles for a trait are called
codominant
heterozygous
homozygous
Cloning produces organisms that are
genetically different
genetically similar
genetically identical
A pedigree
is a picture of all chromosomes in a cell
is the allele passes from parent to child
shows which members of a family have a trait
A couple has 2 girls. What is the probability that the couple's next child will be a girl?
100%
50%
0%
Punnett squares are used to show
all of Mendel's discoveries about genetic crosses
all possible outcomes of a genetic cross
only dominant alleles in a genetic cross
A child has a rare genetic disease although neither parent has the disease. How could the child have inherited this disease?
The disease is dominant and carried by one parent.
The disease is recessive and carried by both parents.
The disorder was caused by a mutation since neither parent had the disease.
What combination of sex chromosomes will produce a male offspring?
XX
YY
XY
The study of heredity is called
parenting
meiosis
genetics
An organism's genetic makeup is called its
phenotype
genotype
When sex cells combine to produce offspring, each will contribute half the number of chromosomes in body cells.
True
False
Genetic disorders are caused by
dominant alleles only
recessive alleles only
DNA mutations or changes in chromosomes
A carrier has
two recessive alleles for a trait
two dominant alleles for a trait
one recessive and one dominant allele for a trait
Which term refers to the physical characteristics that are studied in genetics?
hybrids
offspring
traits
When roan cattle are mated, 25% are red, 50% are roan, and 25% are white. When closely examined, the coat of a roan cow has both red and white hairs. This trait is controlled by
multiple alleles
polygenes
codominant alleles
