829069
Question 1
Question
Which type of cell division produces cells with the diploid (2n) number of chromosomes?
Answer
-
Meiosis
-
Mitosis
Question 2
Question
Which type of cell division produces cells with the haploid (n) number of chromosomes?
Answer
-
Meiosis
-
Mitosis
Question 3
Question
Which type of cell division produces somatic (body) cells?
Answer
-
Meiosis
-
Mitosis
Question 4
Question
Which type of cell division produces gametes?
Answer
-
Meiosis
-
Mitosis
Question 5
Question
Which type of cell division is used in asexual reproduction and leads to no genetic variation?
Answer
-
Meiosis
-
Mitosis
Question 6
Question
Which type of cell division is used in sexual reproduction and leads to genetic variation?
Answer
-
Meiosis
-
Mitosis
Question 7
Question
True or false? In order to undergo cell division, the chromosomes in the cell need to be copied.
Answer
- True
- False
Question 8
Question
Where would you find totipotent, undifferentiated stem cells?
Answer
-
In zygotes and embryos
-
In the microvilli in the small intestine
-
In bone marrow
-
In the tips of shoots and roots
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In the parietal lobe of the brain
Question 9
Question
Why do gametes (sperm and ova) have a haploid (n) number of chromosomes?
Answer
-
They are too small to carry the diploid (2n) number of chromosomes
-
When they fuse in fertilisation, the resulting zygote has the correct diploid (2n) number of chromosomes
-
Half of the chromosomes are missed out as the gamete is a short-lived cell
Question 10
Question
True or false? Research on embryo stem cells is not considered unethical as the embryo is not yet alive.
Answer
- True
- False
Question 11
Question
True or false? In 2010, the first organ grown using stem cells was successfully transplanted into a human child.
Answer
- True
- False
Question 12
Question
Which scientist came up with the idea of genes but was ignored for many years as DNA had yet to be discovered?
Answer
-
Crick and Watson
-
Mendel
-
Darwin
-
Lamarck
Question 13
Question
What does a codon (a sequence of three nucleotide bases) code for?
Answer
-
Nothing
-
A molecule of glucose
-
An amino acid
Question 14
Question
What is the best definition of a recessive allele?
Answer
-
An allele that is "masked" by the effect of a dominant allele
-
An allele that is rarely passed down
-
An allele that causes learning difficulties
Question 15
Question
What would be the genotype of a person who was homozygous dominant for brown eyes?
Answer
-
BB
-
Bb
-
bb
Question 16
Question
True or false? A person's phenotype is the combination of alleles that they have.
Answer
- True
- False
Question 17
Question
What is a Punnet square?
Answer
-
A square number that is 1 less than a prime number, discovered by J W Punnet
-
A biological phenomenon exhibited by ravens which causes them to fly in a square formation
-
A grid which shows all possible combinations of alleles and the corresponding phenotype expressed
Question 18
Question
Which of these diseases are caused by dominant alleles?
Answer
-
Sickle cell anaemia
-
Huntington's disease
-
Cystic fibrosis
-
Polydactyly
Question 19
Question
True or false? Cystic fibrosis causes mucus to become thick and sticky, often leading to problems with breathing, digestion and fertility.
Answer
- True
- False
Question 20
Question
True or false? A carrier of cystic fibrosis will have the heterozygous genotype Cc.
Answer
- True
- False
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