WorksheetsSOL Pass 1 Genetics and Evolution
Total questions: 15
Worksheet time: 8mins
Albino individuals lack all pigmentation so that their hair and skin are white.
This family tree shows that albinism:
is carried only by females in this family
is a recessive genetic trait
is a sex linked gene
requires both parents to be albinos
In squash plants, yellow fruit (Y) is dominant to white fruit (y). If two plants heterozygous for yellow fruit (Yy) are crossed, what are the possible genotypes of the offspring:
YY, Yy, yy only
YY, yy only
Yy only
Yy, yy only
Which statement is best supported by the phylogenetic tree shown?
Species W is still developing from a prior species
Species W first came into existence 10 million years ago
Species V is still alive today and is the oldest species
Species X, Y and Z became extinct 20 million years ago.
Two plants are crossed, and the traits of height and color are assessed in the offspring
The following cross was conducted
TTPP x ttpp
which of the following choices correctly describes the offspring?
3/4 of the plants are tall and purple
All are tall and purple
3/4 of the plants are short and white
All are short and white
In pea plants, tall plants are dominant to short plants.
If two heterozygous tall plants (Tt) are crossed, what percent of the offspring will probably be short?
75%
50%
25%
0%
After a culture of cells is allowed to multiply and is viewed through a microscope, the cells are x-rayed with high energy radiation for less than 1/100th of a second.
After the radiation, many newly produced cells appear different.
What has probably occurred?
contamination
Mutation
Bacterial infection
Speciation
Which of the following is an example of a genetically engineered organism?
Seedless fruits resulting from grafting of one plant to another
A plant that received external DNA to produce natural insecticides
A plant that naturally possesses medicinal properties
A new plant variety created by cross pollination
Thomas Morgan discovered traits linked to sex chromosomes in the fruit fly.
The Punnett square above shows the cross between red-eyed females and white-eyed males.
Fruit flies usually have red eyes. If a female and male offspring from the cross shown above are allowed to mate, what would the offspring probably look like?
( you will need to do a cross on a piece of paper)
2 white-eyed females,
1 white-eyeed male and 1 red-eyed male
2 red-eyed females,
1 red-eyed male
1 white-eyed male
2 red-eyed females
2 white-eyed males
1 red-eyed female
1 white-eyed female
2 red-eyed males
Which of the following statements describes the process of natural selection?
Individual survive that have inherited traits adapted to their environment
Farmers selecct animals with desireable variations for breeding
Populations sharing the same gene pool interbreed and create a new species
New species are formed via genetic engineering
In rabbits, short fur (F) is dominant to long fur (f).
According to the Punnett square , what is the chance of two (Ff) short haired rabbits have offspring with short fur (dominant)
25%
50%
75%
100%
DNA that is derived from the DNA of two or more different species is called-
recombinant DNA
mitochondrial DNA
plasmid
chloroplast DNA
Wild cats such as cheetahs, lions, and tigers experience decreased genetic diversity as their populations decline and become fragmented due to habitat destruction.
Decreased genetic diversity leads to population with:
increased birthrates
disproportionate gender ratios
increased immigration rates
decreased disease resistance
People who have been exposed to excessive radiation often experience mutations.
If these mutations only occur in somatic (body) cells, these people may
experience an increased risk of cancer
experience difficulties replicating RNA
develop entirely new DNA sequences in all cells
pass on these mutations to their offspring
Lamarck was an early scientist who studied the development of characteristics in organisms over time.
Which of the following choices best describes his views on how organisms change over time?
Theory of acquired traits
law of independent assortment
Theory of relative fossil-dating
Theory of artificial selection
In cows, long hair (L) is dominant to short hair (l).
In a cow that is heterozygous (Ll) for long hair, what percentage of the cells undergo Meiosis will carry the dominant allele? ( L l )
25%
50%
75%
100%
