If an allele is dominant, then:a
its phenotype is only expressed in heterozygous individuals.
b. its phenotype is expressed only in homozygous individuals..
c. one allele can mask the expression of a recessive allele in a hybrid.
d. its phenotype is always expressed in all generations.
e. its phenotype is more beneficial than the recessive phenotype.
c
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Roberts Syndrome is an extremely rare genetic disorder that is characterized by mild to severe prenatal retardation or disruption of cell division, leading to malformation of the bones in the skull, face, arms, and legs. Shown below is a pedigree for a family with Robert’s Syndrome. What is the genotype of individual II-C? (R = wild type; r = Robert's syndrome)
A. RR
B. rr
C. Rr
D. R
E. r
For type I diabetes, 15 genes on four different chromosomes are known to influence this
disease. Thus, this disease is __________.
a. polygenic b. pleiotropic c. genomic d. a genetic marker
When acetylcholine stimulates the opening of ligand-gated ion channels on a postsynaptic cell, what is this event called?
A. neuromuscular junction B. temporal summation C. inhibitory postsynaptic potential (IPSP) D. excitatory postsynaptic potential (EPSP) E. synaptic integration
Tuberculosis is caused by an infectious bacterium and causes an annual death toll of 1 to 3 million worldwide people
A) Skin cancer B) Carbon footprint C) Age structure D) Emigration E) Desertification F) Chlorofluorocarbon G) Ozone H) Carrying capacity I) Density-dependent J) Death rate