Test
AQA GCSE Biology Unit 2.5
Este test tiene tiempo límite, así que se abre en el reproductor de siempre.
Preguntas del test (20)
1Which type of cell division produces cells with the diploid (2n) number of chromosomes?
- AMeiosis
- BMitosis
2Which type of cell division produces cells with the haploid (n) number of chromosomes?
- AMeiosis
- BMitosis
3Which type of cell division produces somatic (body) cells?
- AMeiosis
- BMitosis
4Which type of cell division produces gametes?
- AMeiosis
- BMitosis
5Which type of cell division is used in asexual reproduction and leads to no genetic variation?
- AMeiosis
- BMitosis
6Which type of cell division is used in sexual reproduction and leads to genetic variation?
- AMeiosis
- BMitosis
7True or false? In order to undergo cell division, the chromosomes in the cell need to be copied.
- AVerdadero
- BFalso
8Where would you find totipotent, undifferentiated stem cells?
- AIn zygotes and embryos
- BIn the microvilli in the small intestine
- CIn bone marrow
- DIn the tips of shoots and roots
- EIn the parietal lobe of the brain
9Why do gametes (sperm and ova) have a haploid (n) number of chromosomes?
- AThey are too small to carry the diploid (2n) number of chromosomes
- BWhen they fuse in fertilisation, the resulting zygote has the correct diploid (2n) number of chromosomes
- CHalf of the chromosomes are missed out as the gamete is a short-lived cell
10True or false? Research on embryo stem cells is not considered unethical as the embryo is not yet alive.
- AVerdadero
- BFalso
11True or false? In 2010, the first organ grown using stem cells was successfully transplanted into a human child.
- AVerdadero
- BFalso
12Which scientist came up with the idea of genes but was ignored for many years as DNA had yet to be discovered?
- ACrick and Watson
- BMendel
- CDarwin
- DLamarck
13What does a codon (a sequence of three nucleotide bases) code for?
- ANothing
- BA molecule of glucose
- CAn amino acid
14What is the best definition of a recessive allele?
- AAn allele that is "masked" by the effect of a dominant allele
- BAn allele that is rarely passed down
- CAn allele that causes learning difficulties
15What would be the genotype of a person who was homozygous dominant for brown eyes?
- ABB
- BBb
- Cbb
16True or false? A person's phenotype is the combination of alleles that they have.
- AVerdadero
- BFalso
17What is a Punnet square?
- AA square number that is 1 less than a prime number, discovered by J W Punnet
- BA biological phenomenon exhibited by ravens which causes them to fly in a square formation
- CA grid which shows all possible combinations of alleles and the corresponding phenotype expressed
18Which of these diseases are caused by dominant alleles?
- ASickle cell anaemia
- BHuntington's disease
- CCystic fibrosis
- DPolydactyly
19True or false? Cystic fibrosis causes mucus to become thick and sticky, often leading to problems with breathing, digestion and fertility.
- AVerdadero
- BFalso
20True or false? A carrier of cystic fibrosis will have the heterozygous genotype Cc.
- AVerdadero
- BFalso
Información
- Descripción
- Twenty questions for the fifth section in Unit 2 of AQA GCSE Biology: Simple inheritance in plants and animals.
- Autor
- Matthew T
- Idioma
- English
- Visitas
- 442
- Historial
- Creado el 5 may 2014 · actualizado el 30 ene 2017
- Etiquetas
- Valoración
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