Multiple Choice & T/F
Can a normal male be a carrier for an X-linked trait?
a. only if it's a dominant trait
b. only if he has two X chromosomes
c. no
d. yes
c. no
If an organism's genotype for a particular trait is Tt, then the organism is
a. hybrid
b. polygenic
c. purebred
d. recessive
a. hybrid
an abnormal trait passed on through genes
a. carrier
b. genetic disorder
c. Y chromosome
b. genetic disorder
height in pea plants:
a. simple dominance
b. incomplete dominance
c. codominance
a. simple dominance
The normal diploid chromosome number in humans is _______________.
46 (or 23 pairs)
A person with the genotype Aa would exhibit
a. recessive trait
b. genotypic trait
c. polygenic trait
d. dominant trait
d. dominant trait
If a TT plant is grossed with a tt plant, what will its offspring be?
a. all TT
b. all tt
c. all Tt
d. some Tt and some tt
c. all Tt
a. codominance
b. polygenic inheritance
c. carrier
c. carrier
a. codominance
b. sex-linked traitc. polygenic inheritance
c. polygenic inheritance
XY is male and _____ is female
XX
T/F An organism's genotype determines its phenotype
T
In genetics, a cross is
a. a recessive trait
b. one of two alternative factors
c. a test to see how traits are inherited
d. a type of asexual production
c. a test to see how traits are inherited
two or more genes producing a single trait
a. polygenic inheritance
b. codominance
c. multiple alleles
a. polygenic inheritance
human blood types
a. incomplete dominance
b. multiple alleles
c. simple dominance
b. multiple alleles
The different forms of a gene for a particular trait are called _________.
alleles
T/F If a man with genotype TT married a woman with genotype Tt, you would expect all their children to have the dominant trait
T
Which of these is a phenotype?
a. TT
b. blue eyes
c. William the human
d. allele
b. blue eyes
the condition in which two dominant alleles for a single characteristic are both expressed
a. multiple alleles
b. Y chromosome
c. codominance
c. codominance
red-green colorblindness
a. sex-linked trait
b. polygenic inheritance
c. incomplete dominance
a. sex-linked trait
The study of inheritance is called _______.
genetics
The number of boxes in a punnett square shows how many offspring will be produced
F
the genes for most sex-linked traits are carried on
a. the X chromosome
b. the male's Y chromosome
c. the 21st chromosome
d. the female's Y chromosome
a. the x chromosome
the sex chromosome found in males but not females
a. X chromosome
b. Y chromosome
b. Y chromosome
roan cattle (brown and white cows)
a. multiple alleles
b. polygenic inheritance
c. codominance
c. codominance
A cross between snapdragons with red flowers and a snapdragon with white flowers that produces a snapdragon with pink flowers is an example of ___________________.