WorksheetsCh7a - Basic Human Genetics
Total questions: 35
Worksheet time: 18mins
Each genes codes for ___________ protein(s).
one
two
multiple
six
If a woman with A blood and a man with B blood mate, what blood types are possible in their offspring?
Type O only
Type A & B
All blood types (A, B, AB, O)
Only type A, B, & O
Which is true regarding the sex chromosomes of females?
one of the X chromosomes becomes a condensed Barr body (inactivated)
they have one X chromosome and one Y chromosome with different alleles
the Y chromosome becomes inactive in all female somatic cells
both of their X chromosomes are active and contribute to the characteristics
Which of the following is correct for a heterozygous genotype in a somatic cell?
have one copy of the dominant and one copy of the recessive allele
are always male with only one allele
have two copies of the dominant allele
have two copies of the recessive allele
Which of the following is correct for a homozygous recessive genotype in a somatic cell?
have one copy of the dominant and one copy of the recessive allele
are always male with only one allele
have two copies of the dominant allele
have two copies of the recessive allele
Which of the following is correct for a homozygous dominant genotype in a somatic cell?
have one copy of the dominant and one copy of the recessive allele
are always male with only one allele
have two copies of the dominant allele
have two copies of the recessive allele
Pairs of alleles are separated when gametes are formed during meiosis:
law of segregation
central dogma
law of independent assortment
cell theory
If a trait is located on the X chromosome, why do males exhibit the trait all the time?
males have only one Y chromosome
males have only one X chromosome
males have two X chromosomes
males have two Y chromosomes
A trait that is expressed even if there is only one such allele is classified as what kind of trait?
complete dominant
co-dominant
recessive
incomplete dominant
Which of these human traits exhibits dominant/recessive inheritance in humans?
eye color
blood type
red color-blindness
freckles and dimples
Which of these human traits exhibits co-dominant inheritance in humans?
eye color
blood type
red color-blindness
freckles and dimples
Which of these human traits exhibits polygenic/ multifactorial inheritance in humans?
eye color
blood type
red color-blindness
freckles and dimples
Which of these human traits exhibits sex-linked inheritance in humans?
eye color
blood type
red/green color-blindness
freckles and dimples
Human traits are complicated because many are polygenic which means the trait:
is influenced by many genes
is dominant over many traits
has multiple alleles
is neither dominant nor recessive
Phenotype expressed only if two copies of the allele are present:
recessive
sex-linked
co-dominance
autosomal
Phenotype expressed due to allele only on the X chromosome:
recessive
sex-linked
co-dominance
autosomal
Phenotype that is results from two alleles expressing the trait simultaneously:
recessive
sex-linked
co-dominance
autosomal
Phenotype expressed by genes on any chromosome other than the X or Y chromosome:
recessive
sex-linked
co-dominance
autosomal
Phenotype expressed even if only one allele is present:
dominant
sex-linked
co-dominance
recessive
Cells containing 23 pairs of chromosomes:
diploid
haploid
Cells containing 23 chromosomes:
diploid
haploid
Having 2 identical alleles for a trait on both chromosomes of a pair:
Haploid
Autosomal
Homozygous
Heterozygous
Having different alleles for a trait on the chromosome pair:
Haploid
Autosomal
Homozygous
Heterozygous
DNA that does not code for protein:
diploid
junk DNA
genes
gametes
In a dividing cell, DNA is called:
chromatin
chromosomes
RNA
tRNA
In an active cell, DNA is called:
chromatin
chromosomes
RNA
tRNA
Sierra's hair color is Bb. This is her:
genotype
phenotype
Sierra has brown hair. This is her:
genotype
phenotype
Alternate forms of a gene are called:
junk DNA
alleles
chromatids
polymorphisms
Haploid cells are found in:
skin
liver
sperm
stomach
When considering gametogenesis, what process restores the diploid number of chromosomes?
mitosis I
meiosis II
fertilization
spermatogenesis
"Father of Genetics" is:
Mendel
Venter
Jenner
Crick
Mendel’s conclusion about how each trait is carried in the gamete as a separate entity regardless of any other traits is known as what?
law of segregation
central dogma
law of independent assortment
cell theory
When polygenic traits are influenced by environment, they are:
dominant
recessive
multifactorial
alleles
When one allele of a pair is not fully dominant over its partner:
complete dominant
co-dominant
recessive
incomplete dominant
