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Instructions for cell division and inheritance cooperative learning (Kagan) activity
Activity for consolidation of key terminology and revision suitable for higher tier students
AQA B2.7 Cell division and inheritance and OCR gateway
Quiz Quiz Trade
Preparation
Print the following slides onto card or laminate. Cut out the cards along the thick lines.
1. Each pupil is given one card.
2. Each card has key information about the topic and a question with an answer.
3. Pupils will need to move around the room with the intention of swapping cards with as
many other pupils as possible.
4. Pupils pair up and pupil 1 reads out the information on their card followed by the
question. Pupil 2 must then answer the question correctly. If answered incorrectly pupil 1
must guide pupil 2 towards the correct answer. Once the correct answer has been given
the roles are reversed.
5. Once pupils have both given a correct answer, they trade cards and move on to make a
new pair and repeat the process.
Information: Sexual reproduction gives
rise to variation because, when
gametes fuse, one of each pair of
alleles comes from each parent. The
number of chromosomes in a human
gamete (sex cell) is half the number in
body cells.
Information: Cells in reproductive
organs – testes and ovaries in
humans – divide to form gametes. This
type of cell division is called meiosis.
Information: A gene is a small section
of DNA.
Question: What is the number of
chromosomes in a human gamete (sex
cell)? (1 mark)
Question: Gametes are produced by:
a)fertilisation
b)meiosis
c) mitosis (1mark)
Question: Gametes are produced by:
a)fertilisation
b)meiosis
c) mitosis (1mark)
Answer: 23 chromosomes
Answer: b) meiosis
Answer: b) meiosis
Information: Some characteristics are
controlled by a single gene. Each gene
may have different forms called alleles.
Information: An allele that controls the
development of characteristics only if
the dominant allele is not present is a
recessive allele.
Information: An allele that controls the
development of a characteristic when
it is present on only one of the
chromosomes is a dominant allele.
Question: Question: Our
understanding of how genes are
inherited is mostly because of the
work of : (1 mark)
a) Darwin
b) Lamarck
c) Mendel
Question: Cystic fibrosis is caused by:
a) Thick, sticky mucus
b) A recessive allele
c) A dominant allele
Question: In a genetic diagram, how is
a dominant allele shown?
Answer: c) Mendel
Answer: b) a recessive allele
Answer: as a capital letter
Information: Mitosis occurs during
growth or to produce replacement
cells. When a body cell divides by
mitosis: copies of the genetic material
are made and then the cell divides
once to form two genetically
identical body cells.
Information: In human body cells, one
of the 23 pairs of chromosomes carries
the genes that determine sex. In
females the sex chromosomes are the
same (XX); in males the sex
chromosomes are different (XY).
Information: In human body cells, one
of the 23 pairs of chromosomes carries
the genes that determine sex. In
females the sex chromosomes are the
same (XX); in males the sex
chromosomes are different (XY).
Question: As a result of mitosis, how
many cells are produced?
Question: What are the sex
chromosomes in the human male ? (1
mark)
Question: What are the sex
chromosomes in the human female?
(1 mark)
Answer: two cells
Answer: X and Y
Answer: X and X
Information: Chromosomes are made
up of large molecules of DNA
(deoxyribonucleic acid) which has a
double helix structure.
Information: In body cells the
chromosomes are normally found
in pairs. Body cells divide by mitosis.
The chromosomes contain the genetic
information.
Question: A gene is a small section of:
Cellulose? DNA? Or Protein? (1 mark)
Question: Most human body cells
contain: 23 chromosomes, 46
chromosomes or 92 chromosomes.
(1 mark)
Answer: DNA
Answer: 46 chromosomes
Information: Different forms of the same
genes are called alleles. When there are
two different alleles, one is stronger
than the other. This is the dominant
allele. It masks the effect of the
recessive allele.
Question: A homozygous black mouse
mates with a homozygous brown
mouse, all the offspring are black. Why
are no brown offspring produced?
Answer: The allele for black fur is the
dominant allele. The allele for brown fur
is recessive and its effects are masked by
the dominant allele.
Information: Homozygous Information: The sex organs make sex cells or
Having the same alleles at a particular gene on a gametes. In male animals the sex cells are called
chromosome.
sperm. In the female animal the sex cells are
called eggs.
Information: Mitosis is a kind of cell division. All
cells are made from mitosis except the sex cells
(gametes). The daughter cells produced are all
identical to the cell that they came from.
Question: B represents Brown eyes, little b
represents blue eyes. What would the
homozygous genotype be for someone with
brown eyes?
Question: How are sperm cells adapted to their Question: After a human egg has been
function?
fertilised, what type of cell division takes
place? How many chromosomes would be
present in each of the new cells?
Answer: BB
Answer:
Streamlined shape, Tail to swim, Acrosome
producing enzymes to digest cell membrane
Information: Meiosis is a kind of cell division.
Sperm and egg cells are made by meiosis.
Meiosis halves the number of chromosomes in
the daughter cells
Information: Humans have 23 pairs of
Information: genotype – the alleles passed on
rd
chromosomes. The 23 pair is called the sex
to the next generation
chromosomes. These determine whether you
are a boy or a girl. If you are a girl, your sex
chromosomes look alike. You will have two
identical X chromosomes (XX). If you are male
one chromosome will be shorter than the other.
You will have one long X chromosome and one
short y chromosome (XY).
Answer:
Mitosis takes place after fertilisation. Each cell
would contain 23 pairs of chromosomes.
Question: How many chromosomes would you Question: Mr and Mrs Cross have three
Question: B represents brown eyes, and b
expect to find in human sex cells? Explain your children, all boys. They are sure that their next represents blue eyes. What would be the
answer.
child will be a girl. Do you agree? Give the
genotype of someone with blue eyes.
reason for your answer. You may draw a
diagram to help you explain.
Answer: There are 23 chromosomes in a human
sex cell. When fertilisation takes place, the
fertilised egg will have 23 chromosomes from
the mother and 23 from the father. This gives 46
in total.
Answer:
Answer: bb
No I do not agree. They have an equal chance of
having a boy or a girl The diagram below
illustrates this
X
Y
X
XX
XY
Information: Heterozygous - Having
dissimilar alleles that code for the
same gene or trait.
Information: haploid: the number of
chromosomes in a gamete, in humans,
23
Information: phenotype - observable
characteristics
Question: B represents Brown eyes,
little b represents blue eyes. What
would the heterozygous genotype be
for someone with brown eyes?
Question: Why do gametes contain
half the number of chromosomes of a
normal cell
Question: B represents brown eyes, b
represents blue eyes. What
phenotype would someone with Bb
have.
Answer: Bb
Answer: 2 gametes join together at
fertilisation to give offspring with a
new full set of unique DNA.
Answer: Brown eyes
Information: diploid: the number of
chromosomes in a body cell, in humans
46
Question: Why do chromosomes
come in pairs?
Answer: 1 of each pair from mum and 1
from dad