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WorksheetsGENETICS AND BIOTECHNOLOGY
Total questions: 17
Worksheet time: 6mins
A .............is used to determine the genotype of a plant or animal
inbreeding
test cross
The offspring produced by .............are homozygous for most traits
test cross
inbreeding
What is the genotypic ratio of the offpring in the cross above ?
1:1
1:2:1
all are homozygous recessive
all are heterozygous
The cross could be used to determine the genotype of a parent with a dominant phenotype . What is this type of cross called ?
a homozygous cross
a heterozygous cross
a test cross
a parental cross
The result of this test cross would be
2Yy :2 yy
4 YY
1:YY: 2 Yy : 1 yy
4 Yy
Select the advantages of selective breeding .
Plants and animals can grow faster
Time sensitive
Expensive
requires several generations to produce offspring with desired characteristics
Select the DISADVANTAGES OF SELECTIVE BREEDING
Produce more offspring
Time sensitive
Produce more offspring
expensive
Transgenic animals are produced by
plasmids
transformations
ligase
genetic engineering
Biologists use ...........to join two DNA molecules together
ligase
genetic engineering
transformation
plasmids
During ...........a cell takes in DNA from outside the cell.
ligase
transformation
plasmids
genetic engineering
Small , circular DNA molecules that are found in bacterial cells are called
ligase
transformation
plasmids
genetic engineering
What is the role of the molecule above in DNA cloning ?
to carry the foreign DNA into the host cell
to identify the source of DNA as foreign
to identify the host cell that has taken up the gene of interest
to make the foreign DNA susceptible to digestion with enzymes
Why is the polymerase chain reaction used ?
to cut DNA
to ligate DNA
to amplify DNA
to separate DNA
Which sentence about the human genome is false ?
The human genome contains approximately 25,000genes
The human genome contains nucleotide sequences that all code for proteins
The human genome was sequenced by scientists from around the world
The human genome contains long stretches of DNA with no known function
What are variations in specific nucleotides that are linked to human diseases called ?
genomes
single nucleotide polymorphisms
haplotypes
proteomes
For what purposes is DNA fingerprinting used ?
to sequence DNA from bacteria
to separate DNA fragments
to identify individuals who have committed crimes
to identify single nucleotide polymorphisms
What are the advantages of using DNA microarrays ?
It can analyze entire genomes
it can cut DNA
it can copy DNA
it can make DNA disappear
