The SRY gene...
a) is a signaling ligand
b) is a DNA-bending transcription factor
c) is a morphogen
d) does not directly bind to DNA
e) directly binds enhancers of numerous male-specific genes
Give this one a try later!
c) is a DNA-bending transcription factor
Which of the following statements is TRUE about temperature-dependent sex
determination?
a) different sex ratios are produced at different temperatures
b) it does not rely on gene expression
,c) it does not occur in vertebrates
d) intermediate temperatures produce intersex individuals
e) it is the only known form of environmental sex determination
Give this one a try later!
a) different sex ratios are produced at different temperatures
Which of the following statements about RD models is TRUE?
a) genes involved in reaction-diffusion mechanisms only regulate pigmentation
b) patterns generated by a particular model are identical among individuals
c) many diverse patterns can be achieved by altering the rate of diffusion of the
activator or inhibitor
d) none of these are true
e) individuals within a species differ in pigment pattern because different genes are
involved in a reaction-diffusion mechanism in each
Give this one a try later!
c) many diverse patterns can be achieved by altering the rate of diffusion
of the activator or inhibitor
Which of the following statements about mammalian sex chromosomes is TRUE?
a) most genes contributing to female-specific features are located on the X
chromosome
b) the Y chromosome is smaller than the X chromosome
c) all of these statements are true
d) none of these statements are true
e) most genes contributing to male-specific features are located on the Y
chromosome
, Give this one a try later!
b) the Y chromosome is smaller than the X chromosome
Which of the following statements about the Asip gene or protein is FALSE?
a) the Asip gene of mice has more than one promoter
b) loss-of-function mutations in Asip can cause all black individuals of a species that
normally has banded hairs
c) Asip expression is associated with pheomelanin production
d) Asip enhances signal transduction through the Mc1r protein
e) yellow bands on hairs are produced by transient expression of Asip
Give this one a try later!
d) Asip enhances signal transduction through the Mc1r protein
Which of the following correctly matches all terms with their biological category?
a) Melanocyte = pigment; melanosome = cell; melanin = organelle
b) Melanocyte = organelle; melanosome = pigment; melanin = cell
c) Melanosome = cell; melanocyte = organelle; melanin = pigment
d) Melanocyte = cell; melanosome = organelle; melanin = pigment
Give this one a try later!
d) Melanocyte = cell; melanosome = organelle; melanin = pigment
a) is a signaling ligand
b) is a DNA-bending transcription factor
c) is a morphogen
d) does not directly bind to DNA
e) directly binds enhancers of numerous male-specific genes
Give this one a try later!
c) is a DNA-bending transcription factor
Which of the following statements is TRUE about temperature-dependent sex
determination?
a) different sex ratios are produced at different temperatures
b) it does not rely on gene expression
,c) it does not occur in vertebrates
d) intermediate temperatures produce intersex individuals
e) it is the only known form of environmental sex determination
Give this one a try later!
a) different sex ratios are produced at different temperatures
Which of the following statements about RD models is TRUE?
a) genes involved in reaction-diffusion mechanisms only regulate pigmentation
b) patterns generated by a particular model are identical among individuals
c) many diverse patterns can be achieved by altering the rate of diffusion of the
activator or inhibitor
d) none of these are true
e) individuals within a species differ in pigment pattern because different genes are
involved in a reaction-diffusion mechanism in each
Give this one a try later!
c) many diverse patterns can be achieved by altering the rate of diffusion
of the activator or inhibitor
Which of the following statements about mammalian sex chromosomes is TRUE?
a) most genes contributing to female-specific features are located on the X
chromosome
b) the Y chromosome is smaller than the X chromosome
c) all of these statements are true
d) none of these statements are true
e) most genes contributing to male-specific features are located on the Y
chromosome
, Give this one a try later!
b) the Y chromosome is smaller than the X chromosome
Which of the following statements about the Asip gene or protein is FALSE?
a) the Asip gene of mice has more than one promoter
b) loss-of-function mutations in Asip can cause all black individuals of a species that
normally has banded hairs
c) Asip expression is associated with pheomelanin production
d) Asip enhances signal transduction through the Mc1r protein
e) yellow bands on hairs are produced by transient expression of Asip
Give this one a try later!
d) Asip enhances signal transduction through the Mc1r protein
Which of the following correctly matches all terms with their biological category?
a) Melanocyte = pigment; melanosome = cell; melanin = organelle
b) Melanocyte = organelle; melanosome = pigment; melanin = cell
c) Melanosome = cell; melanocyte = organelle; melanin = pigment
d) Melanocyte = cell; melanosome = organelle; melanin = pigment
Give this one a try later!
d) Melanocyte = cell; melanosome = organelle; melanin = pigment
