BIO 340 Mendelian Genetics |Questions with
100% Correct Answers | Verified
You analyze the offspring of a cross between two pea plants. You cross two pea plants, both of
which have purple flowers. You are surprised to see that in the first generation, there are plants
with both purple flowers and white flowers. What is the most likely reason for this?
A. one parent was homozygous recessive and one was heterozygous
B. a new mutation occurred
C. one parent was homozygous recessive and one was homozygous dominant
D. both parental plants were heterozygous
E. one parent was homozygous dominant and one was heterozygous - ✔️✔️D. Both parental
plants were heterozygous
At what phase in cell division are homologous chromosomes aligning in pairs on one plane?
i. Metaphase of mitosis
ii. Metaphase I of meiosis
iii. Metaphase II of meiosis
a. In all three
b. Only i.
c. Only ii.
d. Only iii.
e. Only ii. and iii. - ✔️✔️c. only ii
Between which chromatids does crossing-over normally occur?
, i. Chromatids of heterologous chromosomes
ii. Sister chromatids
iii. Chromatids of homologous chromosomes
a. In all three
b. Only i.
c. Only ii.
d. Only iii.
e. Only i. and iii. - ✔️✔️d. only iii
At what stage are 8 pieces of DNA present in cells of an organism with 2n=8 chromosomes?
a. Gap 1 of cell cycle
b. Mitosis, metaphase
c. Meiosis, prophase I
d. Gametes - ✔️✔️a. gap one of cell cycle
What strategies were helpful when Gregor Mendel studied patterns of inheritances?
I. Study an organism with a short generation time
II. Study an organism with many offspring per generation
III. Focus on many traits at a time
IV. Look at continuous traits
a. All of them
b. Only i. and ii.
c. Only iii. and iv.
100% Correct Answers | Verified
You analyze the offspring of a cross between two pea plants. You cross two pea plants, both of
which have purple flowers. You are surprised to see that in the first generation, there are plants
with both purple flowers and white flowers. What is the most likely reason for this?
A. one parent was homozygous recessive and one was heterozygous
B. a new mutation occurred
C. one parent was homozygous recessive and one was homozygous dominant
D. both parental plants were heterozygous
E. one parent was homozygous dominant and one was heterozygous - ✔️✔️D. Both parental
plants were heterozygous
At what phase in cell division are homologous chromosomes aligning in pairs on one plane?
i. Metaphase of mitosis
ii. Metaphase I of meiosis
iii. Metaphase II of meiosis
a. In all three
b. Only i.
c. Only ii.
d. Only iii.
e. Only ii. and iii. - ✔️✔️c. only ii
Between which chromatids does crossing-over normally occur?
, i. Chromatids of heterologous chromosomes
ii. Sister chromatids
iii. Chromatids of homologous chromosomes
a. In all three
b. Only i.
c. Only ii.
d. Only iii.
e. Only i. and iii. - ✔️✔️d. only iii
At what stage are 8 pieces of DNA present in cells of an organism with 2n=8 chromosomes?
a. Gap 1 of cell cycle
b. Mitosis, metaphase
c. Meiosis, prophase I
d. Gametes - ✔️✔️a. gap one of cell cycle
What strategies were helpful when Gregor Mendel studied patterns of inheritances?
I. Study an organism with a short generation time
II. Study an organism with many offspring per generation
III. Focus on many traits at a time
IV. Look at continuous traits
a. All of them
b. Only i. and ii.
c. Only iii. and iv.
