The theory proposed in the early 20th century which suggested that chromosomes carry
genes is called... - ANSWER the chromosome theory of iheritance
_________ is caused by an extra copy of chromosome 21. - ANSWER Down
syndrome
The principle, or law, of heredity which states that only the dominant trait can be seen in an
organism that contains in its genes a pair of contrasting traits is called... -
ANSWER Mendel's law of dominance
Mendel studied __________ to help him understand genetic inheritance -
ANSWER Pea plants
If a female fruit fly that is homozygous for the dominant red eye trait (RR) mates with a male
fruit fly that is homozygous for the recessive white eye trait (rr), all of the resulting offspring
will be _______ and have ______ eyes. - ANSWER heterozygous (Rr), red
____________ was the first person to study principles of heredity, and is therefore called the
"father of genetics". - ANSWER Gregor Mendel
When inheritance of a particular trait follows a pattern of _____________, individuals that
are heterozygous for the trait have the same phenotype, or physical characteristic, as
individuals who are homozygous for the trait. - ANSWER complete dominance
1
, If a heterozygous, red-eyed female fruit fly (Rr) mates with a heterozygous, red-eyed male
fruit fly (Rr) what ratio of the resulting offspring will have red eyes ________, while the
remaining ratio _______ will have white eyes? - ANSWER 3/4, 1/4
The principle, or law, of heredity which states that for each trait there are 2 copies of the
gene or genes that are responsible for the trait, and that these copies separate during
formation of the sex cells and recombine during fertilization is called...? -
ANSWER Mendel's Law of Segregation.
Humans have ___ chromosomes per cell. - ANSWER 46
A trait controlled by a gene located on a sex chromosome is called a __________. -
ANSWER Sex-linked trait.
The AB blood type is an example of ________. - ANSWER co dominance
_____ is the branch of Biology that studies the ways in which offspring inherit traits from
their parents. - ANSWER Genetics
The sex of most animals is determined by special chromosomes called...? -
ANSWER sex chromosomes
The physical appearance of the entire set of chromosomes of a given animal is called a
_________. - ANSWER Karyotype
________ is the process whereby genetic material is exchanged between homologous
chromosomes during synapsis of the first meiotic division. - ANSWER Crossing over
Each copy of a gene is called an _____. - ANSWER allele
2
genes is called... - ANSWER the chromosome theory of iheritance
_________ is caused by an extra copy of chromosome 21. - ANSWER Down
syndrome
The principle, or law, of heredity which states that only the dominant trait can be seen in an
organism that contains in its genes a pair of contrasting traits is called... -
ANSWER Mendel's law of dominance
Mendel studied __________ to help him understand genetic inheritance -
ANSWER Pea plants
If a female fruit fly that is homozygous for the dominant red eye trait (RR) mates with a male
fruit fly that is homozygous for the recessive white eye trait (rr), all of the resulting offspring
will be _______ and have ______ eyes. - ANSWER heterozygous (Rr), red
____________ was the first person to study principles of heredity, and is therefore called the
"father of genetics". - ANSWER Gregor Mendel
When inheritance of a particular trait follows a pattern of _____________, individuals that
are heterozygous for the trait have the same phenotype, or physical characteristic, as
individuals who are homozygous for the trait. - ANSWER complete dominance
1
, If a heterozygous, red-eyed female fruit fly (Rr) mates with a heterozygous, red-eyed male
fruit fly (Rr) what ratio of the resulting offspring will have red eyes ________, while the
remaining ratio _______ will have white eyes? - ANSWER 3/4, 1/4
The principle, or law, of heredity which states that for each trait there are 2 copies of the
gene or genes that are responsible for the trait, and that these copies separate during
formation of the sex cells and recombine during fertilization is called...? -
ANSWER Mendel's Law of Segregation.
Humans have ___ chromosomes per cell. - ANSWER 46
A trait controlled by a gene located on a sex chromosome is called a __________. -
ANSWER Sex-linked trait.
The AB blood type is an example of ________. - ANSWER co dominance
_____ is the branch of Biology that studies the ways in which offspring inherit traits from
their parents. - ANSWER Genetics
The sex of most animals is determined by special chromosomes called...? -
ANSWER sex chromosomes
The physical appearance of the entire set of chromosomes of a given animal is called a
_________. - ANSWER Karyotype
________ is the process whereby genetic material is exchanged between homologous
chromosomes during synapsis of the first meiotic division. - ANSWER Crossing over
Each copy of a gene is called an _____. - ANSWER allele
2
