B1 Quiz


A quiz made for B1 21st Century science GCSE revision, not including genetic testing.
Leah Firmstone
Quiz by Leah Firmstone, updated more than 1 year ago
Leah Firmstone
Created by Leah Firmstone over 7 years ago

Resource summary

Question 1

Label the image with the correct terms.
  • Cell
  • Nucleus
  • Chromosome
  • DNA
  • Gene

Question 2

Choose the correct order below, from smallest to largest.
  • Base - Gene - DNA - Chromosome - Nucleus - Cell
  • Gene - Base - DNA - Chromosome - Nucleus - Cell
  • Cell - Nucleus - Chromosome - DNA - Gene - Base

Question 3

Genes instruct the cells to make proteins needed for your body to work. The strands of DNA are made up of four chemicals that we call bases, along with phosphate and sugar molecules. It is the order of these four different bases along each piece of the DNA strand that determines the protein code.
  • True
  • False

Question 4

Choose the characteristic which is an example of a genetic trait.
  • blue eyes
  • dyed hair
  • tatoos

Question 5

In some cases, several [blank_start]genes[blank_end] work together to determine a feature. A good example of this is [blank_start]eye[blank_end] colour. Human eye colour does not follow a simple [blank_start]pattern[blank_end] of inheritance, because it is [blank_start]determined[blank_end] by a [blank_start]number[blank_end] of different genes. As a result, there is a wide [blank_start]range[blank_end] of eyes colours in humans. This is an example of [blank_start]continuous[blank_end] variation, where there is a wide range of possible [blank_start]outcomes[blank_end].
  • genes
  • eye
  • pattern
  • determined
  • number
  • range
  • continuous
  • outcomes

Question 6

The genetic make up of an individual organism is called the phenotype.
  • True
  • False

Question 7

Tick the correct facts about chromosomes.
  • Each chromosome contains hundreds of genes.
  • Chromosomes occur in triplets.
  • Human body cells have 46 chromosome pairs.
  • The sex cells have only one chromosome from each pair.
  • Offspring get one of each pair of chromosomes from their mother and one from their father, meaning they have two alleles for each gene.

Question 8

It is possible that both alleles of a gene are the same, in which case the individual is said to be [blank_start]homozygous[blank_end] for that trait. If the alleles for a gene in an individual are different, the individual is said to be [blank_start]heterozygous[blank_end] for the trait.
  • homozygous
  • heterozygous

Question 9

Explain, using ideas about chromosomes and alleles, why siblings often look similar to each other, but not identical.
  • Click here.
  • Not here.

Question 10

Draw a punnett square for a cross between a hairy-toed male (Hh) and a female with hairless toes (hh). What proportion of the offspring would have hairy toes?
  • 0.25
  • 0.50
  • 0.75
  • 1.00

Question 11

Clones are individuals with [blank_start]identical[blank_end] genes. Bacteria, plants and even some [blank_start]animals[blank_end] can reproduce [blank_start]asexually[blank_end] to form clones. In asexual reproduction, only one [blank_start]parent[blank_end] is involved, so the offspring has identical [blank_start]DNA[blank_end] to the parent. As clones have identical DNA, any differences between clones and their parents are likely to be due to the [blank_start]environment[blank_end] which they are in, rather than to their [blank_start]genes[blank_end].
  • identical
  • animals
  • asexually
  • parent
  • DNA
  • environment
  • genes

Question 12

The diagram below shows the steps of artificial animal cloning. Choose the correct labels for each stage of the process.
  • A donor cell is taken from a sheep.
  • Donor Nucleus
  • The two cells are fused.
  • Egg cell from adult sheep
  • Nucleus of the egg cell is removed
  • The fused cell begins dividing normally
  • Embryo
  • Embryo is placed in the womb of female
  • Embryo develops normally into a clone

Question 13

Adult stem cells can develop into any type of cell.
  • True
  • False
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