BIO 121 FINAL EXAM LATEST 2024 ACTUAL EXAM TEST
BANK 300 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
If you start with one nucleus containing 46 chromosomes at the
end of one round of mitosis, how many nuclei will there be? How
many chromosomes will there be per nucleus? - ANSWER--Two
nuclei & 46 chromosomes each
Where are the two chromatids of a chromosome attached to each
other? - ANSWER--At the centromere
What are homologous chromosomes? - ANSWER--
Chromosomes with the same genes in the same order
In meiosis, when does synapsis occur? - ANSWER--In prophase
I
Which of the following is the most common for a human male? XX
or XY? - ANSWER--XY
One nucleus contains 14 chromosomes prior to meiosis. After
meiosis is completed, how many nuclei are there and how many
chromosomes per nucleus are there? - ANSWER--There are 4
nuclei after complete meiosis and 7 chromosomes per nucleus
, BIO 121 FINAL EXAM LATEST 2024 ACTUAL EXAM TEST
BANK 300 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
Meiosis II is similar to mitosis in that... - ANSWER--Sister
chromatids separate during anaphase
Meiosis and fertilization are part of the life cycle of what kinds of
organisms? - ANSWER--All sexually reproducing organisms
Two dice are rolled simultaneously; what are the chances that
both will show 6? - ANSWER--1/36
To get this you square the 6
Which process is responsible for the fact that any one
chromosome you contribute to a gamete is a mix of chromosomes
from your two parents? - ANSWER--The process of crossing
over
The individual with genotype AaBbCCDdEE can make many
genetically different gametes. What is the major reason for this? -
ANSWER--Different possible arrangements of chromosomes
early in meiosis
An organism that is homozygous for a particular gene has what? -
ANSWER--Has two copies of the same allele of that gene
, BIO 121 FINAL EXAM LATEST 2024 ACTUAL EXAM TEST
BANK 300 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
The allele for red flowers is dominant while the allele for white
flowers is recessive. You have a red-flowered plant of unknown
genotype. You perform a test cross and about half of the F1
progeny are red and about half are white. What is the genotype of
the red-flowered parent? - ANSWER--By crossing Rr x rr you
get half Rr and half rr
The answer is Rr
What are the chances of a carrier homozygous recessive and a
homozygous not afflicted couple having a baby with cystic
fibrosis? - ANSWER--By crossing Cc x CC you get...
CC: 50%
Cc: 50%
indicating that the chance of this couple having a baby with
the disease is 0%
You cross a red-flowered plant and a white-flowered plant, and all
the F1 individuals have pink flowers. You can conclude: -
ANSWER--Incomplete dominance
, BIO 121 FINAL EXAM LATEST 2024 ACTUAL EXAM TEST
BANK 300 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
A man was born with 6 fingers on each hand and 6 toes on each
foot. His wife and their daughter have the normal number of digits.
Extra digits is a dominant trait. What fraction of this couple's
children would be expected to have extra digits? - ANSWER--
50% of their children will be expected to have this trait
In the pedigree on the test, does alkaptonuria appear to be
caused by a dominant allele or by a recessive allele, or is there
not enough information to determine whether the disorder is
recessively or dominantly inherited? - ANSWER--This trait is
caused by a recessive allele
Consider the locus that codes for carbohydrates on the surface of
red blood cells. What is an example of codominance? -
ANSWER--IAIB
What causes Down Syndrome? - ANSWER--An error during
meiosis
Does vaccinating a child increase the chances of the child
developing autism? - ANSWER--No, it does not
In a dihybrid cross one gene is part of one chromosome pair and
a different gene is part of another chromosome pair. In other
BANK 300 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
If you start with one nucleus containing 46 chromosomes at the
end of one round of mitosis, how many nuclei will there be? How
many chromosomes will there be per nucleus? - ANSWER--Two
nuclei & 46 chromosomes each
Where are the two chromatids of a chromosome attached to each
other? - ANSWER--At the centromere
What are homologous chromosomes? - ANSWER--
Chromosomes with the same genes in the same order
In meiosis, when does synapsis occur? - ANSWER--In prophase
I
Which of the following is the most common for a human male? XX
or XY? - ANSWER--XY
One nucleus contains 14 chromosomes prior to meiosis. After
meiosis is completed, how many nuclei are there and how many
chromosomes per nucleus are there? - ANSWER--There are 4
nuclei after complete meiosis and 7 chromosomes per nucleus
, BIO 121 FINAL EXAM LATEST 2024 ACTUAL EXAM TEST
BANK 300 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
Meiosis II is similar to mitosis in that... - ANSWER--Sister
chromatids separate during anaphase
Meiosis and fertilization are part of the life cycle of what kinds of
organisms? - ANSWER--All sexually reproducing organisms
Two dice are rolled simultaneously; what are the chances that
both will show 6? - ANSWER--1/36
To get this you square the 6
Which process is responsible for the fact that any one
chromosome you contribute to a gamete is a mix of chromosomes
from your two parents? - ANSWER--The process of crossing
over
The individual with genotype AaBbCCDdEE can make many
genetically different gametes. What is the major reason for this? -
ANSWER--Different possible arrangements of chromosomes
early in meiosis
An organism that is homozygous for a particular gene has what? -
ANSWER--Has two copies of the same allele of that gene
, BIO 121 FINAL EXAM LATEST 2024 ACTUAL EXAM TEST
BANK 300 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
The allele for red flowers is dominant while the allele for white
flowers is recessive. You have a red-flowered plant of unknown
genotype. You perform a test cross and about half of the F1
progeny are red and about half are white. What is the genotype of
the red-flowered parent? - ANSWER--By crossing Rr x rr you
get half Rr and half rr
The answer is Rr
What are the chances of a carrier homozygous recessive and a
homozygous not afflicted couple having a baby with cystic
fibrosis? - ANSWER--By crossing Cc x CC you get...
CC: 50%
Cc: 50%
indicating that the chance of this couple having a baby with
the disease is 0%
You cross a red-flowered plant and a white-flowered plant, and all
the F1 individuals have pink flowers. You can conclude: -
ANSWER--Incomplete dominance
, BIO 121 FINAL EXAM LATEST 2024 ACTUAL EXAM TEST
BANK 300 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
A man was born with 6 fingers on each hand and 6 toes on each
foot. His wife and their daughter have the normal number of digits.
Extra digits is a dominant trait. What fraction of this couple's
children would be expected to have extra digits? - ANSWER--
50% of their children will be expected to have this trait
In the pedigree on the test, does alkaptonuria appear to be
caused by a dominant allele or by a recessive allele, or is there
not enough information to determine whether the disorder is
recessively or dominantly inherited? - ANSWER--This trait is
caused by a recessive allele
Consider the locus that codes for carbohydrates on the surface of
red blood cells. What is an example of codominance? -
ANSWER--IAIB
What causes Down Syndrome? - ANSWER--An error during
meiosis
Does vaccinating a child increase the chances of the child
developing autism? - ANSWER--No, it does not
In a dihybrid cross one gene is part of one chromosome pair and
a different gene is part of another chromosome pair. In other
