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WorksheetsApplied Genetics
Total questions: 15
Worksheet time: 15mins
The process by which desired traits of certain plants and animals are selected and passed on to their future generations
Selective Breeding
Hybridization
Inbreeding
crossing organisms with different forms of a trait to produce offspring with specific traits results in hybrids also known as the production of
(a)
Care must be taken to identify organisms with desired traits and successfully cross them to yield the right combination of traits from both parents
True
False
Which two are examples of hybridization?
Farm breeders breed two different varieties of tomato to produce a hybrid that has both the disease resistance of one parent and the fast growth rate of the other parent.
Horse breeders breeding the Clydesdale horses to
Rice breeders producing higher yields of hybrid rice
varieties
Select all the advantages of hybridization
bred to be more nutritious
have the ability to adapt to a wide range of changes in the environment
produce greater numbers of offspring
Select two disadvantages of hybridization
time consuming
disease resistant
expensive
Advantages of hybridization sometimes outweigh the disadvantages.
True
False
The process in which two closely related organisms are bred to have the desired traits and to eliminate the undesired ones in future generations
Hybridization
Selective Breeding
Inbreeding
Pure breeds are not maintained by inbreeding.
True
False
Which is a disadvantage of inbreeding?
Inbreeding can maintain large population of offsprings
Harmful recessive traits also can be passed on to future generations.
None of the above
If both parents carry the recessive allele, the harmful trait will likely not be eliminated
True
False
A test cross involves breeding an organism that has the unknown genotype with one that is homozygous recessive for the desired trait
True
False
It is not an important thing for a breeder to determine the genotype of a hybrid when producing
True
False
If the parent's trait was homozygous dominant the offspring will
1:1 ratio , half of each phenotype ( trait )
all have the dominant phenotype ( trait )
If the parent's trait was heterozygous the offspring will
1:1 ratio , half of each phenotype ( trait )
all have the dominant phenotype ( trait )
