GCD 3022 EXAM 1 QUESTIONS
COMPLETE WITH 100% VERIFIED
ANSWERS
\.With regard to genotype, what is a true-breeding plant? - ANSWERS-
Homozygous dominant or recessive
\.A pea plant is Tt. Which of the following statements is correct? -
ANSWERS-Its genotype is Tt, and its phenotype is tall.
\.A Tt pea plant is crossed to a tt plant. What is the expected ratio of
phenotypes for offspring from this cross? (Construct a Punnett Square) -
ANSWERS-1 tall : 1 dwarf
\.A pea plant has the genotype RrYy. Assume independent assortment.
How many different types of gametes can it make and in what
proportions? - ANSWERS-1 RY : 1 Ry : 1 rY : 1 ry
\.A true-breeding plant with round and yellow seeds (RRYY) was crossed
with a true-breeding plant with wrinkled and green seeds (rryy). Round
and yellow seeds are dominant traits. The F1 plants were allowed to
,self-fertilize. Based on Mendel's law (independent assortment), which
of the following display the expected ratio of phenotypes? - ANSWERS-9
Round yellow : 3 Round green : 3 Wrinkled yellow : 1 Wrinkled green
\.(Comprehension Q) A true-breeding plant with round and green seeds
(RRyy) was crossed with a true-breeding plant with wrinkled and yellow
seeds (rrYY). Round and yellow seeds are dominant traits. The F1 plants
were crossed with plants with wrinkled green seeds (rryy). Based on
Mendel's law (independent assortment), which of the following displays
the expected ratio of phenotypes? - ANSWERS-1 Round yellow : 1
Round green : 1 Wrinkled yellow : 1 Wrinkled green
\.(Comprehension Q) A pea plant has the genotype rrYy. Assume
independent assortment. How many different types of gametes can it
make and in what proportions? - ANSWERS-1 rY : 1 ry
\.(Comprehension Q) In humans, the allele for brown eye color (B) is
dominant to that for blue eye color (b). Two parents who are
heterozygotes for eye color produce children. What is the probability
that their first three children have brown color eye? (Use the Product
Rule) - ANSWERS-27/64
(Probability to have brown eye color 3/4, three children: 3/4 x 3/4 x
3/4)
, \.(Comprehension Q) A cross is made between AA Bb Cc Dd and Aa Bb
cc dd. What would be the probability that the cross produces an
offspring that is AA bb Cc Dd? - ANSWERS-1/32
\.What is a chromosome? - ANSWERS-It is made of proteins and a single
molecule of DNA that contains genes.
\.Which of the following statements is false?
Different versions of a given gene are called loci.
The physical location of a gene is called locus.
There are usually more than one allele per gene.
Different versions of a given gene are called alleles. - ANSWERS-
Different versions of a given gene are called loci.
\.Which of the following contains identical alleles? - ANSWERS-A pair of
sister chromatids
\.Which of the following statements is false? - ANSWERS-A brain cell has
one set of chromosomes
(Brain cells are diploid.)
\.Which of the following cells are called gametes or germ cells? -
ANSWERS-Sperm and egg cells
COMPLETE WITH 100% VERIFIED
ANSWERS
\.With regard to genotype, what is a true-breeding plant? - ANSWERS-
Homozygous dominant or recessive
\.A pea plant is Tt. Which of the following statements is correct? -
ANSWERS-Its genotype is Tt, and its phenotype is tall.
\.A Tt pea plant is crossed to a tt plant. What is the expected ratio of
phenotypes for offspring from this cross? (Construct a Punnett Square) -
ANSWERS-1 tall : 1 dwarf
\.A pea plant has the genotype RrYy. Assume independent assortment.
How many different types of gametes can it make and in what
proportions? - ANSWERS-1 RY : 1 Ry : 1 rY : 1 ry
\.A true-breeding plant with round and yellow seeds (RRYY) was crossed
with a true-breeding plant with wrinkled and green seeds (rryy). Round
and yellow seeds are dominant traits. The F1 plants were allowed to
,self-fertilize. Based on Mendel's law (independent assortment), which
of the following display the expected ratio of phenotypes? - ANSWERS-9
Round yellow : 3 Round green : 3 Wrinkled yellow : 1 Wrinkled green
\.(Comprehension Q) A true-breeding plant with round and green seeds
(RRyy) was crossed with a true-breeding plant with wrinkled and yellow
seeds (rrYY). Round and yellow seeds are dominant traits. The F1 plants
were crossed with plants with wrinkled green seeds (rryy). Based on
Mendel's law (independent assortment), which of the following displays
the expected ratio of phenotypes? - ANSWERS-1 Round yellow : 1
Round green : 1 Wrinkled yellow : 1 Wrinkled green
\.(Comprehension Q) A pea plant has the genotype rrYy. Assume
independent assortment. How many different types of gametes can it
make and in what proportions? - ANSWERS-1 rY : 1 ry
\.(Comprehension Q) In humans, the allele for brown eye color (B) is
dominant to that for blue eye color (b). Two parents who are
heterozygotes for eye color produce children. What is the probability
that their first three children have brown color eye? (Use the Product
Rule) - ANSWERS-27/64
(Probability to have brown eye color 3/4, three children: 3/4 x 3/4 x
3/4)
, \.(Comprehension Q) A cross is made between AA Bb Cc Dd and Aa Bb
cc dd. What would be the probability that the cross produces an
offspring that is AA bb Cc Dd? - ANSWERS-1/32
\.What is a chromosome? - ANSWERS-It is made of proteins and a single
molecule of DNA that contains genes.
\.Which of the following statements is false?
Different versions of a given gene are called loci.
The physical location of a gene is called locus.
There are usually more than one allele per gene.
Different versions of a given gene are called alleles. - ANSWERS-
Different versions of a given gene are called loci.
\.Which of the following contains identical alleles? - ANSWERS-A pair of
sister chromatids
\.Which of the following statements is false? - ANSWERS-A brain cell has
one set of chromosomes
(Brain cells are diploid.)
\.Which of the following cells are called gametes or germ cells? -
ANSWERS-Sperm and egg cells
