Free Printable A level Biology AQA Unit 7

Worksheets

A level Biology AQA Unit 7

Total questions: 17

Worksheet time: 22mins

Name

Class

Date

Which of these taxonomic groups is the smallest?

Domain

Genus

Phylum

Family

Order

Who devised the binomial naming system?

Wallace

Darwin

Linnaeus

Mendel

Which of these have 70s ribosomes?

Prokaryotes

Eukaryotes

Which contemporary of Darwin independently developed a theory of evolution?

Mendel

Linnaeus

Herschel

Wallace

Which of the following is an example of post-translational control of gene expression?

A non-functional protein produced from edited mRNA

β-galactosidase activity in Escherichia coli exposed to lactose

Liver cells beginning glycogenolysis in response to glucagon.

A Hox gene product acting as a transcription factor for many other genes.

The diagram shows the pedigree of a family carrying the sex-linked allele for red-green colour blindness. From which labelled member of his family did E inherit the allele for colour-blindness?

The deer in a captive population vary in colour. 53 deer are brown and 14 are white. The coat colour of deer is determined by the gene R/r, where the dominant allele R codes for brown and the recessive allele r codes for white. Calculate the frequency of the allele R in the population using the Hardy-Weinberg principle. $p+q=1$ $p2+2pq+q2=1$

0.21

0.46

0.54

0.79

Fur colour in cats is partly controlled by a gene on the X chromosome. The gene has two alleles, one coding for black fur and one coding for ginger fur. The two alleles are codominant, so a heterozygous cat has patches of black and patches of ginger fur, a pattern called tortoiseshell. When a black female cat was mated with a ginger male, the F1 generation consisted of black males and tortoiseshell females. What phenotypic ratio would be expected in the F2 generation?

1 black female : 1 tortoiseshell female : 2 black males

1 black female : 1 ginger female : 2 black males

1 black female : 1 ginger female : 1 black male : 1 ginger male

1 black female : 1 tortoiseshell female : 1 black male : 1 ginger male

Two men who are identical twins marry two women who are also identical twins. Each couple has a daughter. The daughters are more genetically similar than is usual for first cousins. Which statement describes the degree of genetic similarity between the daughters?

They are genetically different from each other due to independent assortment in meiosis

They are genetically different from each other due to random mutation.

They are genetically identical because random mutation is rare.

They are genetically identical because they share the same parental gene pool.

10.

Skin colour in onions is controlled by two pairs of alleles, S/s and R/r, located on separate autosomes. The allele S is dominant and must be present to allow development of pigment in the onion skin. Onions with genotype ss have white skin. The allele R is dominant and gives a red colour. The allele r is recessive and gives a yellow colour. What is the ratio of phenotypes in the offspring of a cross between plants of genotypes SsRR and ssrr?

all red

1 red : 1 white

1 red : 1 yellow

1 white : 2 red : 1 yellow

11.

An interbreeding population of finches became geographically separated, forming two isolated groups, S and T. The two groups experienced different selection pressures for many years. Much later, some finches from group S were introduced to the habitat of T. What observation determines whether the S finches are now a different species to T finches?

Their DNA sequence percentage similarity is less than 100%.

They differ in the shape of their beaks.

They fail to produce fertile F1 hybrids.

They have been separate for 3 000 000 years.

12.

A series of three codominant alleles, IA, IB and IO, controls whether red blood cells display antigens A, B, both or none of these on their cell surface membranes. The four children of two parents each have a different ABO blood group. What were the blood groups of the parents?

A and B

A and O

A and AB

AB and O

13.

In a population of birds, the frequencies of genotypes for gene H/h differed significantly from the frequencies expected according to the Hardy-Weinberg principle. Which reason could explain this deviation?

There was no mating at random with respect to H/h.

There was no mutation at the H/h gene locus.

There was no migration into or out of the population.

Natural selection did not favour either H or h at the expense of the other allele.

14.

Which treatment is an example of somatic gene therapy?

growing a replacement organ from a person’s stem cells

injecting a functional dominant allele into the liquid in the eye to correct a retinal disease

introducing an extra allele for a growth hormone into sheep embryos

joining a sperm cell, mother’s nucleus and an enucleated donor oocyte to make a healthy baby

15.

The primary structure of the enzyme cytochrome c oxidase 1 was sequenced for five species, P, Q, R, S and T. The table shows the number of amino acid differences between each pair of species. Which phylogenetic tree represents how they are related?

16.

Construction of a new road system splits a population of a rare snail species into three sub-populations, J, K and L. Each of these populations is reproductively isolated.

The table shows the sizes of the three populations immediately after the building of the road and again ten years later. DNA analysis was used to find:

p the relative frequency of the dominant allele of a gene

q the relative frequency of the recessive allele of this gene.

The three areas of habitat remained the same as each other over the ten years.

Which statements are supported by this data?

Natural selection is occurring in populations K and L.

The Founder Effect is strongest in population L.

The observed allele frequency changes result from genetic drift.

17.

Genetic engineering to give bacteria the ability to produce human insulin involves these steps.

J Using reverse transcriptase to make cDNA of the insulin gene.

K Incubating a plasmid with a restriction enzyme.

L Extracting mRNA from human pancreatic cells.

M Adding the recombinant vector to bacteria in calcium chloride solution.

N Incubating the prepared gene with the cut plasmid.

Which line of the table shows these steps in the correct order?

100 %

A level Biology AQA Unit 7

Total questions: 17

Worksheet time: 22mins

Similar Resources on Wayground