Grade 12 Biology Exam||Latest Exam
Update With Most Tested Exam
Questions And Well Verified Correct
Answers||Already Graded A+
CLONES -CORRECT ANSWER genetically identical organisms derived from a single
genetic source
POLYGENIC TRAITS -CORRECT ANSWER traits such as skin color, height which are
controlled by many (poly) genes
ASEXUAL REPRODUCTION -CORRECT ANSWER mode of reproduction where
offspring arise from a single parent and inherits the genes of that parent only (2n → 2n)
TELOMERES -CORRECT ANSWER the protective caps at the end of chromosomes
SEX-LINKED TRAITS -CORRECT ANSWER traits that are carried on the X
chromosome
GAMETES -CORRECT ANSWER reproductive cells (i.e. egg and sperm) formed
during meiosis (2n → n)
GENES -CORRECT ANSWER controls the traits in an organism
CARRIERS -CORRECT ANSWER they can pass a gene for a recessive disorder; they
are heterozygous for a recessive disorder; they have one dominant allele
PYRIMIDINES -CORRECT ANSWER nitrogen bases in DNA; include thymine and
cytosine
ALLELES -CORRECT ANSWER an alternative form of a single gene passed from
generation to generation
ZYGOTE -CORRECT ANSWER part of sexual reproduction; result of the union of egg
and sperm (2n)
PURINES -CORRECT ANSWER nitrogen bases in DNA; include adenine and guanine
CROSS POLLINATION -CORRECT ANSWER process Mendel used to pollinate
flowers of short plants with pollen from tall plants (when pollen is delivered to a flower
from a different plant)
, FERTILIZATION -CORRECT ANSWER the process by which haploid gametes
combine → result is the formation of a zygote
CROSSING OVER -CORRECT ANSWER exchange of genetic material between
homologous chromosomes → results in genetic recombination (occurs in meiosis during
prophase I)
DIHYBRID -CORRECT ANSWER individual differing in two traits (i.e. BbEe)
MUTAGEN -CORRECT ANSWER physical/chemical agent that can change genetic
material (i.e. asbestos, UV light from the sun)
GEL ELECTROPHORESIS -CORRECT ANSWER an electric current is used to
separate DNA fragments according to the size of the fragments
HOMOLOGOUS CHROMOSOMES -CORRECT ANSWER a pair of chromosomes of
the same kind (i.e. sex chromosomes)
SOMATIC CELLS -CORRECT ANSWER body cells; contain 46 chromosomes (2n -
diploid)
RECOMBINANT DNA -CORRECT ANSWER made by inserting a segment of DNA
from one organism into a chromosome of another
SEXUAL REPRODUCTION -CORRECT ANSWER when genetic material of two
organisms combine (egg and sperm) to create a new organism; process that starts with
meiosis that ensures that organisms will have the same diploid number of
chromosomes as its parents when fertilization is successful; sometimes referred to as
reduction division
MULTIPLE ALLELES -CORRECT ANSWER series of 3 or more alleles that can code
for a trait (i.e. human blood groups)
GENETICS -CORRECT ANSWER study of how traits are inherited through the
interactions of alleles
GENE THERAPY -CORRECT ANSWER treating genetic disorders by inserting normal
alleles into cells
THEORY -CORRECT ANSWER series of statements that can explain multiple
hypotheses; provides explanations and predictions that can be tested
HAPLOID -CORRECT ANSWER cell with one of each kind of chromosome (sex cells)
→n
Update With Most Tested Exam
Questions And Well Verified Correct
Answers||Already Graded A+
CLONES -CORRECT ANSWER genetically identical organisms derived from a single
genetic source
POLYGENIC TRAITS -CORRECT ANSWER traits such as skin color, height which are
controlled by many (poly) genes
ASEXUAL REPRODUCTION -CORRECT ANSWER mode of reproduction where
offspring arise from a single parent and inherits the genes of that parent only (2n → 2n)
TELOMERES -CORRECT ANSWER the protective caps at the end of chromosomes
SEX-LINKED TRAITS -CORRECT ANSWER traits that are carried on the X
chromosome
GAMETES -CORRECT ANSWER reproductive cells (i.e. egg and sperm) formed
during meiosis (2n → n)
GENES -CORRECT ANSWER controls the traits in an organism
CARRIERS -CORRECT ANSWER they can pass a gene for a recessive disorder; they
are heterozygous for a recessive disorder; they have one dominant allele
PYRIMIDINES -CORRECT ANSWER nitrogen bases in DNA; include thymine and
cytosine
ALLELES -CORRECT ANSWER an alternative form of a single gene passed from
generation to generation
ZYGOTE -CORRECT ANSWER part of sexual reproduction; result of the union of egg
and sperm (2n)
PURINES -CORRECT ANSWER nitrogen bases in DNA; include adenine and guanine
CROSS POLLINATION -CORRECT ANSWER process Mendel used to pollinate
flowers of short plants with pollen from tall plants (when pollen is delivered to a flower
from a different plant)
, FERTILIZATION -CORRECT ANSWER the process by which haploid gametes
combine → result is the formation of a zygote
CROSSING OVER -CORRECT ANSWER exchange of genetic material between
homologous chromosomes → results in genetic recombination (occurs in meiosis during
prophase I)
DIHYBRID -CORRECT ANSWER individual differing in two traits (i.e. BbEe)
MUTAGEN -CORRECT ANSWER physical/chemical agent that can change genetic
material (i.e. asbestos, UV light from the sun)
GEL ELECTROPHORESIS -CORRECT ANSWER an electric current is used to
separate DNA fragments according to the size of the fragments
HOMOLOGOUS CHROMOSOMES -CORRECT ANSWER a pair of chromosomes of
the same kind (i.e. sex chromosomes)
SOMATIC CELLS -CORRECT ANSWER body cells; contain 46 chromosomes (2n -
diploid)
RECOMBINANT DNA -CORRECT ANSWER made by inserting a segment of DNA
from one organism into a chromosome of another
SEXUAL REPRODUCTION -CORRECT ANSWER when genetic material of two
organisms combine (egg and sperm) to create a new organism; process that starts with
meiosis that ensures that organisms will have the same diploid number of
chromosomes as its parents when fertilization is successful; sometimes referred to as
reduction division
MULTIPLE ALLELES -CORRECT ANSWER series of 3 or more alleles that can code
for a trait (i.e. human blood groups)
GENETICS -CORRECT ANSWER study of how traits are inherited through the
interactions of alleles
GENE THERAPY -CORRECT ANSWER treating genetic disorders by inserting normal
alleles into cells
THEORY -CORRECT ANSWER series of statements that can explain multiple
hypotheses; provides explanations and predictions that can be tested
HAPLOID -CORRECT ANSWER cell with one of each kind of chromosome (sex cells)
→n
