GENETICS EXAM 2 AND ITS
SOLUTIONS
Ploidy refers to the number of sets of chromosomes
found in an organism. Most multicellular organisms
are _____(2n)
Diploid
The physical outcome, or trait, that results from gene
expression is a genotype. (T/F)
False
What term is used for a variety that passes a trait onto
all its offspring when crossed to a similar variety?
-Self-fertile
-Cross-fertile
-True-breeding
-Dominant
True Breeding
Which characteristics are true of complex traits?
Select all that apply.
-complex traits exhibit continuous variation
-complex traits are the result of multiple genes
-genes underlying complex traits are inherited in a
Non-Mendelian fashion
-Complex traits are true-breeding
-complex traits exhibit continuous variation
-complex traits are the result of multiple genes
This question relates to Mendel's breeding
experiments with peas. A true breeding plant
, producing smooth peas was crossed with a true-
breeding plant producing wrinkled peas (cross 1). The
offspring of cross 1 all produced smooth peas. The
offspring of cross 1 were then crossed with the
wrinkled-pea parent (cross 2). Which of the statements
about the cross outcomes are true? Please select all
that apply.
-Half of the offspring of cross 2 had smooth peas
- All of the offspring of cross 2 had smooth peas
-All of the offspring of cross 1 had the same genotype
-The offspring of cross 2 had a 3:1 smooth: wrinkled
ratio
-The wrinkled allele is recessive
-Half of the offspring of cross 2 had smooth peas
-All of the offspring of cross 1 had the same genotype
-The wrinkled allele is recessive
This question relates to Mendel's breeding
experiments with peas. Mendel crossed a true-
breeding smooth pea plant with a true-breeding
wrinkled pea plant. Mendel then crossed the offspring
to each other. Which statements are true about the
offspring of the second cross? Please select all that
apply.
-All the offspring had smooth peas
-Half of the offspring had a genotype with 1 recessive
and 1 dominant allele
-Half of the offspring had smooth peas
-The offspring of cross 2 had a 3:1 smooth:wrinkled
ratio
SOLUTIONS
Ploidy refers to the number of sets of chromosomes
found in an organism. Most multicellular organisms
are _____(2n)
Diploid
The physical outcome, or trait, that results from gene
expression is a genotype. (T/F)
False
What term is used for a variety that passes a trait onto
all its offspring when crossed to a similar variety?
-Self-fertile
-Cross-fertile
-True-breeding
-Dominant
True Breeding
Which characteristics are true of complex traits?
Select all that apply.
-complex traits exhibit continuous variation
-complex traits are the result of multiple genes
-genes underlying complex traits are inherited in a
Non-Mendelian fashion
-Complex traits are true-breeding
-complex traits exhibit continuous variation
-complex traits are the result of multiple genes
This question relates to Mendel's breeding
experiments with peas. A true breeding plant
, producing smooth peas was crossed with a true-
breeding plant producing wrinkled peas (cross 1). The
offspring of cross 1 all produced smooth peas. The
offspring of cross 1 were then crossed with the
wrinkled-pea parent (cross 2). Which of the statements
about the cross outcomes are true? Please select all
that apply.
-Half of the offspring of cross 2 had smooth peas
- All of the offspring of cross 2 had smooth peas
-All of the offspring of cross 1 had the same genotype
-The offspring of cross 2 had a 3:1 smooth: wrinkled
ratio
-The wrinkled allele is recessive
-Half of the offspring of cross 2 had smooth peas
-All of the offspring of cross 1 had the same genotype
-The wrinkled allele is recessive
This question relates to Mendel's breeding
experiments with peas. Mendel crossed a true-
breeding smooth pea plant with a true-breeding
wrinkled pea plant. Mendel then crossed the offspring
to each other. Which statements are true about the
offspring of the second cross? Please select all that
apply.
-All the offspring had smooth peas
-Half of the offspring had a genotype with 1 recessive
and 1 dominant allele
-Half of the offspring had smooth peas
-The offspring of cross 2 had a 3:1 smooth:wrinkled
ratio
