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7th Grade - Fall 2019 - Semester Test
Terms in this set (86)
One advantage of _________ reproduction is that the offspring have more genetic variation.
The joining of an egg cell and a sperm cell is called
An offspring that is the result of __________ reproduction is genetically identical to its parent.
________________ almost always helps an animal either survive or reproduce.
The first time a bird builds a nest, the bird builds the nest perfectly. This kind of behavior is an example of
___________ is a disease in which cells grow and divide uncontrollably.
Scientists think cancer begins when a ____________ occurs in DNA.
What is the use of drugs to treat a disease called?
The order of the __________ along a gene determines the order in which amino acids are put together to form a protein.
______________ RNA copies the coded message from the DNA and carries it into the cytoplasm during protein synthesis.
Where does protein synthesis take place?
Which nitrogen base is only found in RNA and not DNA?
What is a a mass of abnormal cells?
During DNA replication, adenine (A) always pairs with
What is any change in a gene or chromosome?
During protein synthesis, the protein continues to grow until it reaches the ______ codon.
The order of ____________________________ along a gene forms the genetic code.
Gregor Mendel _________________________________ plants to study different characteristics in his genetics experiments.
two dominant alleles
What does the notation TT mean to geneticists?
one in four
What is the probability of producing a tall pea plant from a genetic cross between two hybrid tall pea plants?
A __________________________________ shows all the possible outcomes of a genetic cross?
The ________________ theory of inheritance states that genes are carried from parents to offspring on chromosomes
Which term refers to physical characteristics that are studied in genetics?
An organism's genetic makeup is its
the ability to sing well
Which of the following traits is influenced by both inheritance and environmental factors?
Factors that control traits are called
Scientists call an organism that has two different alleles for a trait a
What does the notation Tt mean to geneticists?
What is a number that describes how likely it is that an event will occur?
If a homozygous black guinea pig (BB) is crossed with a homozygous white guinea pig (bb), what is the probability that an offspring will have black fur?
An organism's physical appearance is its
When sex cells combine to produce offspring, each sex cell will contribute _________ the number of chromosomes in body cells
The different forms of a gene are called
An organism that has two identical alleles for a trait is
A heterozygous organism has two _________________ alleles for a trait.
Chromosomes are made up of many ___________ joined together.
____________________________________________ changes with new evidence or new interpretations.
During an experiment, which factors must be controlled so that researchers can draw a logical conclusion from the experiment?
ask your teacher to explain
When preparing for a laboratory investigation, if any of the directions are unclear you should
one or more of your senses to gather information is called
Explaining or interpreting the things you observe based on reasoning from what you already know is called
A possible explanation for a set of observations or answer to a scientific question is called a(n)
In a scientific experiment, facts, figures, and other evidence gathered through observations are called
Observations that deal with a number or amount are called
One useful tool that may help a scientist interpret data by revealing unexpected patterns is a
A well-tested explanation for a wide range of observations or experimental results is called a scientific
Observations that deal with descriptions that cannot be expressed in numbers are called
Making a statement or claim about what will happen in the future based on past experience or evidence is called
When scientists create a representation of a complex process, they are
In science, a hypothesis must be
During an experiment, if you purposely change the temperature to test a hypothesis, the temperature is called the
The factor that may change in response to the manipulated variable is called the
In a scientific experiment, the responding variable can also be called the
An organized way to collect and record scientific observations is using a(n)
A summary of what you have learned from a scientific experiment is called a(n)
Which stage of the scientific process enables a scientist to check the work of other scientists?
A statement that describes what scientists expect to happen every time under a particular set of conditions is a
A(n) ____________________ organism is the offspring of many generations of organisms that have the same trait.
If a(n) ____________________ allele is present, its trait will appear in the organism.
Mendel used the principles of ____________________ to predict what percent of offspring would show a particular trait.
In pea plants, the tall-stem allele and the short-stem allele are different forms of the same ____________________.
If D represents the dominant allele of a gene, then ____________________ represents the recessive allele.
A chart used to predict results of genetic crosses is known as a(n) ____________________.
An organism that has two dominant or two recessive alleles is said to be ____________________ for that trait.
Genes are carried from parents to their offspring on structures called ____________________.
If all of the sex cells of an organism have the T allele, the genotype of that organism must be ____________________.
An organism can be heterozygous for some traits and ____________________ for others.
The chromosomes in a pair may each have different ____________________ for each gene.
Facts, figures, and other evidence collected during a scientific investigation are called __________________.
The basic SI unit of mass is the __________________.
The factors that can change in an experiment are called ____________________.
If you state that your basketball team will win tonight's game because your team has always beaten the other team in the past, you are making a(n) ____________________.
In a scientific experiment, the factor that may change in response to the manipulated variable is called the responding or ____________________ variable.
An experiment in which only one variable is manipulated at a time is called a(n) ____________________ experiment.
A scientific ____________________ is a well-tested explanation for a wide range of observations or experimental results.
Making ____________________ involves creating representations of complex objects or processes to help people study and understand things that cannot be observed directly.
A change in DNA is called a(n) ____________________.
Cancer can spread when cells break off a tumor and are carried through the body by the ____________________.
The genetic code is found in the order of nitrogen ____________________ along a gene.
____________________ RNA adds amino acids to a growing protein.
A set of three bases codes for one specific ____________________ in a protein.
A section of DNA has the base sequence TGAG. The corresponding section of a messenger RNA molecule will have the base sequence ____________________.
The substitution of one base for another during DNA replication is an example of a(n) ____________________.
When a mutation disturbs the cell cycle, the result can be ____________________, or uncontrolled cell division.
The most common treatments for cancer include drugs, surgery, and ____________________.
A form of treatment in which drugs destroy cancer cells is called ____________________.
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