Variation

Which human phenotype is influenced by both environmental and genetic factors?

Feb/March 2017

Four phenotypes of a population of people were investigated. Which phenotype would show discontinuous variation?

Feb/March 2018

Some insects are able to reproduce by sexual reproduction as well as asexual reproduction. In both forms, chromosomes are transferred from the parent or parents to the offspring. Fig. 9.1 is a sketch of a parent insect and seven of her offspring: M, N, P, R, S, T and U.

Feb/March 2018

Which human characteristic provides an example of discontinuous variation?

Feb/March 2019

Which table row about variation is correct?

Feb/March 2023

Which of the following statements about variation is correct?

Feb/March 2024

A student recorded the heights of her friends to investigate how they differ. Which statements are true for this kind of variation?

Feb/March 2025

What causes genetic variation within populations?

Feb/March 2025

Which human characteristic exhibits discontinuous variation?

May/June 2016

Every short-haired bumblebee living on the island traces its ancestry back to only two parents. Those parents were brought in from the mainland. Which statement about the island’s short-haired bumblebee population, when compared with the mainland population, is correct?

May/June 2016

In humans, which characteristic displays discontinuous variation?

May/June 2016

The graph displays the masses of two different kinds of tomato. What conclusion can be drawn from the graph?

May/June 2017

The graph presents the masses of two distinct types of tomato. What conclusion can be drawn from the graph?

May/June 2017

The graph displays the masses of two different varieties of tomato. What conclusion can be drawn from the graph?

May/June 2017

Which characteristic is an example of discontinuous variation?

May/June 2017

Students investigated how mineral ion deficiencies affected the growth of radish plants. The seeds used in the experiment came from plants that had been self-pollinated for many generations, so all of them were genetically identical.

May/June 2017

The bar chart displays the heights of pea plants that were raised from 500 pea seeds. What kind of variation is shown by the plants?

May/June 2018

Which description of continuous variation is correct?

May/June 2019

The diagram illustrates the percentage of tongue rollers and non-rollers in a human population. Which term describes this kind of variation?

May/June 2019

The diagram indicates a possible evolutionary path for $\textit{Homo sapiens}$ (present-day humans) from earlier ancestors. $\textit{Homo sapiens}$ (present-day humans) $\uparrow$ $\textit{Homo heidelbergensis}$ $\uparrow$ $\textit{Homo erectus}$ $\uparrow$ $\textit{Homo habilis}$ Which statement about present-day humans and their ancestors is correct?

May/June 2019

The diagram illustrates how Homo sapiens (present-day humans) may have evolved from earlier ancestors. Homo sapiens (present-day humans) ↑ Homo heidelbergensis ↑ Homo erectus ↑ Homo habilis Which statement about Homo sapiens and its ancestors is correct?

May/June 2019

The graph illustrates the distribution of blood groups in one area. This is an example of discontinuous variation. Which statement about discontinuous variation is correct?

May/June 2021

The graph illustrates the percentages of the various blood groups in a human population. Which type of variation is represented by human blood groups?

May/June 2021

A dimple is an indentation in the cheek that appears when a person smiles.

May/June 2021

The graph illustrates the range of heights seen among people in a human population. Which row matches the variation displayed by the graph?

May/June 2022

Blood group is inherited genetically. Humans have four blood groups: A, B, AB and O. Surveys were done in two separate countries to find the percentage of each population in every blood group. The results are shown in Fig. 5.1.

May/June 2022

Which term describes a genetic change?

May/June 2023

Which human characteristics are passed on by inheritance?

May/June 2023

Which definition correctly describes continuous variation?

May/June 2023

The graph plots the frequency of a human characteristic, X. Which characteristics might X represent?

May/June 2023

What is one example of a human characteristic that displays discontinuous variation?

May/June 2023

Which term describes a genetic change?

May/June 2023

Which kinds of variation can be inherited?

May/June 2023

How would you define variation?

May/June 2023

Give one example of continuous variation.

May/June 2024

Which statement gives the description of a type of variation?

May/June 2024

What does the term biodiversity describe?

May/June 2024

Humans make two kinds of ear wax: wet or dry. Which row shows the variation in human ear wax?

May/June 2025

Which feature is an example of continuous variation?

May/June 2025

Which row gives the description of continuous and discontinuous variation?

May/June 2025

Which one of these human characteristics is an example of continuous variation?

Oct/Nov 2016

Why is tongue rolling classified as an example of discontinuous variation?

Oct/Nov 2017

Give one example of continuous variation.

Oct/Nov 2017

Why is tongue rolling classified as an example of discontinuous variation?

Oct/Nov 2017

A large number of the apple varieties found around the world developed from one wild species, Malus sieversii. Which processes were responsible for producing thousands of genetically distinct apple varieties?

Oct/Nov 2018

The curve illustrates the distribution of a human characteristic. Which characteristic is represented by the curve?

Oct/Nov 2018

Which example shows discontinuous variation?

Oct/Nov 2018

An ecologist investigated variation within one species of xerophyte.

Oct/Nov 2018

The following characteristics were observed in a pair of identical twins. Which of these characteristics shows phenotypic variation?

Oct/Nov 2019

The graph displays human heights. Which statement is correct?

Oct/Nov 2019

Give the meaning of variation.

Oct/Nov 2019

Variation that is continuous and variation that is discontinuous.

Oct/Nov 2021

Which human phenotype displays discontinuous variation?

Oct/Nov 2022

What factors can raise genetic variation in a species?

Oct/Nov 2022

The graph illustrates the frequency of the human characteristic X. Which characteristics could X represent?

Oct/Nov 2022

The graph displays the heights of the students in a class. Which statement about these data is correct?

Oct/Nov 2023

Several phenotypes are given. Which of these phenotypes are examples of continuous variation?

Oct/Nov 2023

Tusks are modified teeth. In one region of the world, most elephants were formerly born with tusks. During the past 50 years, a greater number of female elephants have been born without tusks. These elephants are producing offspring that also lack tusks. Which kinds of variation are shown by this example?

Oct/Nov 2023

Which processes are the sources of genetic variation in populations?

Oct/Nov 2023

Use the details in Fig. 6.1 and your own knowledge to fill in the sentences on variation.

Oct/Nov 2023

ABO blood groups are an example of one form of variation. What causes this form of variation?

Oct/Nov 2024

The graph illustrates the percentage of a population displaying different phenotypes for one characteristic. Which human characteristic is represented by X?

Oct/Nov 2024

State the meaning of the term variation.

Oct/Nov 2024

Which statement concerning variation and example is correct?

Oct/Nov 2025

Which statement explains red-green colour blindness?

Oct/Nov 2025