Download Inheritance – question hunt Teaching notes

Inheritance – question hunt
Teaching notes
This resource is a series of questions which become more demanding – ranging from
asking students to state/name something to asking them to explain a more difficult
concept.
It could be used in a variety of ways.
1. The cards could be cut up and placed around the room (more than one set could
be distributed). The students move round to find cards, and then record their
answers on paper. They could be asked to find two of each type of question, e.g.
state, define and explain. The cards could be photocopied onto different
coloured card depending on the demand of the question. The task could be
differentiated by asking different groups to find different numbered/coloured
cards.
2. The cards could be used as a quick starter where a student picks a card and reads
out the question. Students discuss the answer in pairs and one pair is picked to
suggest an answer. If the answer is correct, they choose the next card.
3. The cards could be used as a team quiz where teams choose to attempt an
easy/medium/difficult question. If they get it right, then they are awarded 1
point for easy, 2 points for medium and 3 points for difficult questions.
© www.teachitscience.co.uk 2012
20141
Page 1 of 3
Inheritance – question hunt
1.
2.
3.
4.
Name the two types
of cell division.
Name a genetic
disorder caused by a
recessive allele.
Name a genetic
disorder caused by a
dominant allele.
Give two examples of
how stem cells can be
used to treat medical
conditions.
5.
6.
7.
8.
Name the plant which
Mendel studied.
What name is given to
an individual who has
the genotype Cc
where c is the allele
for cystic fibrosis.
Name the two types
of allele that exist.
What is the term
given to a genotype
with two dominant
alleles.
9.
10.
11.
12.
Describe the process
of mitosis.
Describe Mendel’s
discoveries.
Describe the process
of meiosis.
Describe the structure
and location of stem
cells in humans.
13.
14.
15.
16.
Define the terms
“dominant allele” and
“recessive allele”.
Describe how a
Punnett square is
used.
Describe the
difference between
homozygous and
heterozygous
genotypes.
Describe the
difference between
DNA, genes and
chromosomes.
17.
18.
19.
20.
Explain why DNA can
be used to identify
individuals.
Explain the difference
between phenotype
and genotype.
Explain how cell
division by meiosis
gives rise to variation.
Explain how gender is
determined in humans.
21.
22.
23.
24.
Explain why there are
no carriers of a
disease caused by a
dominant allele.
Explain why two tall
plants produce tall and
short offspring.
Explain why a plant
Explain why mitosis
with a genotype Tt will
produces two
be tall.
daughter cells whereas
meiosis produces four
daughter cells.
© www.teachitscience.co.uk 2012
20141
Page 2 of 3
Inheritance – question hunt
Suggested answers
1.
2.
3.
4.
Meiosis, mitosis
Cystic fibrosis
Huntington’s disease
To grow into tissue to mend damaged tissue e.g. heart disease. Replace cells e.g.
insulin producing cells in diabetic.
5. Sweetpea
6. Carrier
7. Dominant, recessive
8. Homozygous
9. Cell division, chromosomes copied, line up in middle, each set moves to opposite
poles, cell divides, chromosome number maintained.
10. Mendel discovered that characteristics are not blended, there are dominant forms
and recessive forms of characteristics.
11. Cell division, chromosomes copied, line up in middle in pairs, crossing over may
occur, one of each pair moves to opposite poles, cell divides. Chromosomes then
line up in middle in each new cell, each set moves to opposite pole, cell divides.
Four daughter cells, all haploid.
12. Early embryos, unspecialised cells
13. Allele is a form of a gene. Dominant allele is expressed over a recessive allele.
14. Used to show the results of a cross. Like a table, parental genotypes are put in
first row and column, four possible offspring genotypes are put in the remaining
boxes.
15. Homozygous – both alleles are the same e.g. TT or tt. Heterozygous – both alleles
are different e.g. Tt
16. DNA is a molecule, chromosomes are structures made of long coiled DNA
molecules and proteins, a gene is a section of a chromosome that codes for one
characteristic (protein).
17. DNA fingerprinting. DNA code is unique to each individual.
18. Phenotype is the expression of a characteristic that can be observed. Genotype is
the genetic makeup of an organism.
19. Crossing over chromosomes when lined up. Random lining up of chromosomes.
20. Sex chromosomes, XX – female, XY – male. When crossed 50% offspring are
female, 50% are male.
21. The gene for tallness has two alleles T (tall) and t (short). T is dominant so masks
the recessive short allele.
22. Cells divide once in mitosis, cells divide twice in meiosis.
23. Carriers have heterozygous genotype. If disease caused by a dominant allele then
will be expressed in a heterozygous individual.
24. Both must be heterozygous so when crossed 25 % of offspring will be homozygous
recessive and therefore short.
© www.teachitscience.co.uk 2012
20141
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