DISCOVERING THE LIFE SPAN BY JOHN W
SANTROCK CHAPTER 1 TO 10 FINAL TEST
PAPER 2026 COMPLETE QUESTIONS
ANSWERS PREMIUM SCRIPT
◉ Heterozygous.
Answer: Inheriting from parents different forms of a gene for a given
trait.
◉ Allele.
Answer: one of the alternative forms of a gene that governs a
characteristic, such as hair color
◉ Phenylketonuria (PKU).
Answer: An inherited disorder in which a child is unable to make use
of phenylalanine, an essential amino acid present in proteins found
in milk and other foods. If untreated, it allows phenylalanine to build
to toxic levels, causing brain damage and mental retardation.
◉ Polygenic inheritance.
Answer: Inheritance in which a combination of multiple gene pairs
is responsible for the production of a particular trait.
,◉ Reaction range.
Answer: The potential degree of variability in the expression of a
trait due to environmental conditions.
◉ X-linked genes.
Answer: Genes that are considered recessive and located only on the
X chromosome.
◉ Hemophilia.
Answer: A blood disorder, is produced by x-linked genes, a recurrent
problem in the royal families of Europe.
◉ Behavioral genetics.
Answer: The study of the effects of heredity on behavior. Takes a
broader approach, considering how our personality and behavioral
habits are affected by genetic factors.
◉ Spontaneous mutation.
Answer: Genes, for no known reason, spontaneously change their
form. Such as x-rays/highly polluted aid, may produce a
malformation of genetic material. When damaged genes are passed
on to a child, the results can be disastrous for physical and cognitive
development.
, ◉ Down syndrome (Trisomy 21).
Answer: A disorder produced by the presence of an extra
chromosome on the 21st pair; once referred to as mongolism. It
occurs in about 1 out of 500 births, risk is much greater in mothers
who are unusually young or old.
◉ Fragile X syndrome.
Answer: A disorder produced by injury to a gene on the X
chromosome, producing mild to moderate mental retardation.
◉ Sickle-cell anemia.
Answer: A blood disorder that gets it name from the shape of the red
blood cells. Around 1-10 of people of African carry genes that
produce sickle-cell anemia, and 1 individual in 400 actually have this
disease. Symptoms include poor appetite, stunted growth, swollen
stomach, and yellowish eyes. Rarely live beyond childhood.
◉ Tay-Sachs disease.
Answer: A disorder that produces blindness and muscle
degeneration prior to death; there is no treatment. Occurring mainly
in Jews of Eastern European ancestry and in French Canadians.
◉ Klinefelter's syndrome.
Answer: A disorder resulting from the presence of an extra X
chromosome that produces underdeveloped genitals, extreme
SANTROCK CHAPTER 1 TO 10 FINAL TEST
PAPER 2026 COMPLETE QUESTIONS
ANSWERS PREMIUM SCRIPT
◉ Heterozygous.
Answer: Inheriting from parents different forms of a gene for a given
trait.
◉ Allele.
Answer: one of the alternative forms of a gene that governs a
characteristic, such as hair color
◉ Phenylketonuria (PKU).
Answer: An inherited disorder in which a child is unable to make use
of phenylalanine, an essential amino acid present in proteins found
in milk and other foods. If untreated, it allows phenylalanine to build
to toxic levels, causing brain damage and mental retardation.
◉ Polygenic inheritance.
Answer: Inheritance in which a combination of multiple gene pairs
is responsible for the production of a particular trait.
,◉ Reaction range.
Answer: The potential degree of variability in the expression of a
trait due to environmental conditions.
◉ X-linked genes.
Answer: Genes that are considered recessive and located only on the
X chromosome.
◉ Hemophilia.
Answer: A blood disorder, is produced by x-linked genes, a recurrent
problem in the royal families of Europe.
◉ Behavioral genetics.
Answer: The study of the effects of heredity on behavior. Takes a
broader approach, considering how our personality and behavioral
habits are affected by genetic factors.
◉ Spontaneous mutation.
Answer: Genes, for no known reason, spontaneously change their
form. Such as x-rays/highly polluted aid, may produce a
malformation of genetic material. When damaged genes are passed
on to a child, the results can be disastrous for physical and cognitive
development.
, ◉ Down syndrome (Trisomy 21).
Answer: A disorder produced by the presence of an extra
chromosome on the 21st pair; once referred to as mongolism. It
occurs in about 1 out of 500 births, risk is much greater in mothers
who are unusually young or old.
◉ Fragile X syndrome.
Answer: A disorder produced by injury to a gene on the X
chromosome, producing mild to moderate mental retardation.
◉ Sickle-cell anemia.
Answer: A blood disorder that gets it name from the shape of the red
blood cells. Around 1-10 of people of African carry genes that
produce sickle-cell anemia, and 1 individual in 400 actually have this
disease. Symptoms include poor appetite, stunted growth, swollen
stomach, and yellowish eyes. Rarely live beyond childhood.
◉ Tay-Sachs disease.
Answer: A disorder that produces blindness and muscle
degeneration prior to death; there is no treatment. Occurring mainly
in Jews of Eastern European ancestry and in French Canadians.
◉ Klinefelter's syndrome.
Answer: A disorder resulting from the presence of an extra X
chromosome that produces underdeveloped genitals, extreme
