A
___________is the study of heredity.
Genetics
_____________set the framework for genetics long before chromosomes or genes had been identified.
Johann Gregor Mendel
a system with convenient characteristics used to study a specific biological phenomenon.
model system
In what year did Mendel present the results of his experiments?
1865
This results from the action of many genes to determine characteristics, like human height.
Continuous variation
The____________ asserted that the original parental traits were lost or absorbed by the blending in the offspring
blending theory of inheritance
Mendel worked with traits that were inherited in distinct classes; this is referred to as _________.
discontinuous variation.
involves mating two true-breeding individuals that have different traits.
hybridizations
Plants used in first-generation crosses were called P0, or_________.
parental generation one
A ________ is defined as a variation in the physical appearance of a heritable characteristic.
trait
obtained about the same ratio regardless of which parent, male or female, contributed which trait. This is called a__________.
reciprocal cross
_____________ are those that are inherited unchanged in a hybridization.
Dominant traits
____________ become latent, or disappear, in the offspring of a hybridization.
Recessive traits
Gregor Mendel studied pea plants in order to learn more about genetics and heredity. Which of the following statements is NOT supported by his research?
Responses
Traits are inherited as events dependent on one another.
The observable traits expressed by an organism are referred to as its _______.
phenotype
An organism’s underlying genetic makeup, consisting of both physically visible and non-expressed alleles, is called its________.
genotype
Diploid organisms that are __________ at a given gene, or locus, have two identical alleles for that gene on their homologous chromosomes.
homozygous
When fertilization occurs between two true-breeding parents that differ in only one characteristic, the process is called?
monohybrid
this technique is still used by plant and animal breeders.
test cross
Many _____________ are genetically inherited.
human diseases
This "law" states that in a heterozygote, one trait will conceal the presence of another trait for the same characteristic.
law of dominance
This law states that paired unit factors (genes) must segregate equally into gametes.
law of segregation
Pedro is studying the genotypes and phenotypes of guinea pigs over several generations. He knows that Black guinea pig color, B, is dominant to brown guinea pig color, b. Which of the following parent generations would result in all offspring being Black in color?
Responses
BB x bb
The physical basis of Mendel’s law of segregation is _________.
the first division of meiosis
In a _______, the dominant-expressing organism is crossed with an organism that is homozygous recessive for the same characteristic.
test cross