A) Dizygotic of either sex
B) Monozygotic
C) Dizygotic males
D) Monozygotic, but only if female
F) A) and D)
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A) The 23rd chromosome determines sex.
B) The first chromosome determines sex.
C) None determines sex.
D) They all determine sex.
F) A) and B)
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A) guanine.
B) thymine.
C) simple sugar.
D) guanine, thymine, and simple sugar.
F) None of the above
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B) False
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A) Only one can penetrate an ovum.
B) Many are killed by normal vaginal acidity.
C) They sometimes swim up the wrong tube.
D) They are attracted to ova by a sound wave ova emit.
F) All of the above
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D
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A) preschool.
B) elementary school.
C) middle school.
D) high school.
F) C) and D)
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A) Cystic fibrosis
B) Down syndrome
C) Sex-linked chromosomal abnormalities
D) Crohn's disease
F) A) and B)
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A) takes the form of a double helix
B) person who carries and transmits characteristics but does not express them
C) correlation between child's genetic endowment and responses elicited from others
D) the genetic material received from parents
E) caused by a recessive gene
F) Polygenically determined
G) female sex hormone
H) neural tube defect
I) twins produced from a single egg
J) cell division that results in non identical cells
K) union of an ovum and a sperm cell
L) involves the membrane that envelops the amniotic sac and fetus
M) associated with the 21st pair of chromosomes
N) how genetic material manifests itself in characteristics
O) twins produced from two eggs
P) XXY sex chromosomal pattern
Q) determined by the father
R) differing alleles for a trait
S) caused by a dominant gene
T) self-propulsion
V) I) and J)
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G
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A) takes the form of a double helix
B) person who carries and transmits characteristics but does not express them
C) correlation between child's genetic endowment and responses elicited from others
D) the genetic material received from parents
E) caused by a recessive gene
F) Polygenically determined
G) female sex hormone
H) neural tube defect
I) twins produced from a single egg
J) cell division that results in non identical cells
K) union of an ovum and a sperm cell
L) involves the membrane that envelops the amniotic sac and fetus
M) associated with the 21st pair of chromosomes
N) how genetic material manifests itself in characteristics
O) twins produced from two eggs
P) XXY sex chromosomal pattern
Q) determined by the father
R) differing alleles for a trait
S) caused by a dominant gene
T) self-propulsion
V) D) and L)
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A) Y sex chromosome.
B) X sex chromosome.
C) XX sex chromosome.
D) XY sex chromosome.
F) C) and D)
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A) takes the form of a double helix
B) person who carries and transmits characteristics but does not express them
C) correlation between child's genetic endowment and responses elicited from others
D) the genetic material received from parents
E) caused by a recessive gene
F) Polygenically determined
G) female sex hormone
H) neural tube defect
I) twins produced from a single egg
J) cell division that results in non identical cells
K) union of an ovum and a sperm cell
L) involves the membrane that envelops the amniotic sac and fetus
M) associated with the 21st pair of chromosomes
N) how genetic material manifests itself in characteristics
O) twins produced from two eggs
P) XXY sex chromosomal pattern
Q) determined by the father
R) differing alleles for a trait
S) caused by a dominant gene
T) self-propulsion
V) A) and I)
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B) False
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A) The risks of spontaneous abortion are about the same with both chorionic villus sampling (CVS) and amniocentesis.
B) Both are performed 14-16 weeks after conception.
C) Any trained practitioner can carry out the procedures with equal skill.
D) Both involve the examination of villi from the membrane that envelops the amniotic sac and fetus.
F) C) and D)
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A) treating biological disorders of monozygotic twins.
B) analyzing the academic abilities of twins versus individual children.
C) learning whether twins should be separated or not.
D) identifying the genetics underlying twins' behaviors and attitudes.
F) B) and C)
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D
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A) takes the form of a double helix
B) person who carries and transmits characteristics but does not express them
C) correlation between child's genetic endowment and responses elicited from others
D) the genetic material received from parents
E) caused by a recessive gene
F) Polygenically determined
G) female sex hormone
H) neural tube defect
I) twins produced from a single egg
J) cell division that results in non identical cells
K) union of an ovum and a sperm cell
L) involves the membrane that envelops the amniotic sac and fetus
M) associated with the 21st pair of chromosomes
N) how genetic material manifests itself in characteristics
O) twins produced from two eggs
P) XXY sex chromosomal pattern
Q) determined by the father
R) differing alleles for a trait
S) caused by a dominant gene
T) self-propulsion
V) A) and Q)
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B) False
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