GENETICS Review 1 Question Preview (ID: 55092)
Genetics, Punnett Squares, Pedigrees, Karyotypes.
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A couple has two children, both of whom are boys. What is the chance that the couple's next child will be a boy?
a) 0%
b) 25%
c) 50%
d) Unknown
How can a dog's phenotype be determined?
a) by looking at the dog's parents
b) by examining the dog's chromosomes
c) by looking at the pedigree of the dog
d) by looking at the dog itself
Genes on homologous chromosomes may have alternate forms that control variations of a trait. What are these alternate forms called?
a) alleles
b) centromeres
c) phenotypes
d) gametes
A white mouse has parents that are both white. The white mouse produces only brown offspring when it mates with a brown mouse. What genotype is the white mouse?
a) homozygous dominant
b) heterozygous
c) homozygous recessive
d) insufficient information to determine
A red flowering plant is crossed with a white flowering plant. Only pink flowering plants are produced. What type of inheritance does this cross demonstrate?
a) inbreeding
b) incomplete dominance
c) polygenic inheritance
d) co-dominance
A man with type O blood is married to a woman with type B blood. Which blood type(s) can their children have?
a) A and B only
b) B and o only
c) AB and B only
d) B only
The failure of chromosomes to separate properly during meiosis is called
a) recombination
b) gene segregation
c) nondisjunction
d) fertilization
When a zygote contains three copies of a particular chromosome as a result of non-disjunction, which condition occurs
a) trisomy
b) monosomy
c) polyploidy
d) monoploidy
The gene for red-green color blindness is located on the X chromosome. Therefore, which of the following is normally not possible?
a) a carrier mother to pass the gene on to her daughter
b) a carrier mother to pass the gene on to her son
c) a color-blind father to pass the gene on to his daughter
d) a color-blind father to pass the gene on to his son
An organism that has a gene for a trait but does not express it.
a) probability
b) genotype
c) incomplete dominance
d) carrier
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