Question 1 Select one answer.
Two heterozygous individuals are crossed. What percentage oftheir offspring will be heterozygous?
a)50%
b)75%
c)100%
d)25%
Question 2 Select one answer.
In peas purple is dominant to white for flower color. A purpleflower is crossed with a white flower. All the offspring (over 100plants) produce purple flowers. What is the genotype of the purpleflower?
a)pp
b)Either PP or Pp
c)PP
d)Pp
Question 3 Select one answer.
A heterozygous germ cell undergoes meiosis. The gametes will
a)only have the recessive allele
b)only have the dominant allele
c)either have the dominant or the recessive allele
d)have both the dominant or the recessive allele
Question 4 Select one answer.
Sex-linked disorders
a)are always dominant are
b)always recessive
c)can be either dominant or recessive
d)are neither dominant nor recessive
Question 5 Select one answer.
A nucleus is built around chromatids which have separated. Thisoccurs during which stage of meiosis?
a)Telophase II
b)Metaphase I
c)Metaphase II
d)Telophase I
Question 6 Select one answer.
The condition of having anincorrect number of chromosomes is called ____________.
a)nondisjunction
b)aneuploidy
c)epistatis
d)trisomy
Question 7 Select oneanswer.
In humans females are
a)XY
b)YY
c)none of these
d)XX
Question 8 Select oneanswer.
Autosomal means that the gene isfound on the
a)X chromosomes
b)the Y chromosome
c)either the X or the Ychromosome
d)neither on the X nor theY
Question 9 Select oneanswer.
What organism did Mendelstudy?
a)Roses
b)Ants
c)Peas
d)Yeast
Question 10 Select oneanswer.
Huntington's disease is anautosomal dominant disorder. If two individuals who areheterozygous at this locus breed, what are the chances that theiroffspring will develop Huntington's?
a)100%
b)75%
c)50%
d)25%
Question 11 Select oneanswer.
Plum gametes have 24 chromosomes.How many chromosomes would a zygote have?
a)12
b)24
c)36
d)48
Question 12 Select oneanswer.
Hydrangeas are blue in acidicsoil with available aluminum, and they are pink in alkaline soilwithout available aluminum, but they cannot be orange under anysoil condition. The color of hydrangeas is affect by
a)genetics only
b)the environment only
c)genetics and theenvironment
Question 13 Select oneanswer.
Somatic mosquito cells have 6chromosomes. How many chromosomes do gametes have?
a)3
b)6
c)12
d)24
Question 14 Select oneanswer.
Alleles are different versions ofa
a)Gene
b)Phenotype
c)Genotype
d)Chromosome
Question 15 Select oneanswer.
A female producesgametes:
a)that have either an X or a Ychromosome
b)That have 2 Xchromosomes
c)that have a Y chromosomeonly
d)that have an X chromosomeonly
Question 16:
use the following infromation to answer the next 4 questions
In dogs, colored fur (E) is dominant to un-colored fur (e).Blackfur color (B) is dominant to brown fur color (b). The E gene isepistatic to the B gene. A yellow male dog is mated to a blackfemale. the male's parents were both brown dogs. The female'smother was yellow and her father was brown
Q1 of 4: what is the genetype of the male dog in thisexample
a)eeBb
b)eeBB
c)ee
d)eebb
Q2 of 4: What is the genotype of the female dog in thisexample?
a)EeBb
b)EEBB
c)EeBB
d)EEBb
Q3 or 4: What percentage of their puppies will be yellow?
a)100%
b)75%
c)50%
d)25%
Q4 of 4: what percentahe of the puppies will be homozygous forthe B gene.
a)100%
b)75%
c)50%
d)25%
