Page 158 - Big Ideas Year 10 sciPAD 2025

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158 SCIPAD - BIG IDEAS - BOOK 2
THE BASIS OF HEREDITY
1 2 3
4 5
6 7 8
9 10
11
12
Across
5. Made of a sugar molecule, a phosphate
and a base.
9. Type of reproduction in which the
offspring have the same genetic code as
the parent.
10. Adenine always bonds with this base.
11. You have 46 of these in every cell in your
body.
12. Term used to describe the shape of a
DNA molecule.
Down
1. Abbreviation for deoxyribonucleic acid.
2. The 'A' in DNA stands for this.
3. Number of chromosomes found in a
normal human cell.
4. Cytosine always bonds with this base.
6. A length of DNA that holds the instrcutions
for a certain characteristic.
7. Chromosomes are found in this part of a
cell.
8. Type of reproduction that produces
T
T
A
C
G
Spine A
Rung
Tab
Spine B
Introductory Genetics Multiple Choice
1. The passing of characteristics from parent to offspring is called:
a. genetics b. heredity c. chromosomes d. proteins
2. Most cells in the human body contain this many chromosomes:
a. 48 b. 46 c. 23 d. 22
3. Chromosomes are found inside the:
a. nucleus b. DNA c. genes d. nucleotide
4. A section of DNA that codes for a particular feature is called a:
a. chromosome b. DNA c. nucleotide d. gene
Introductory Genetics Crossword
Across
5. Made of a sugar molecule, a phosphate and a base.
9. Type of reproduction in which the offspring have the
identical genetic code as the parent.
10. Adenine always bonds with this base.
11. You have 46 of these in every cell in your body.
12. Term used to describe the shape of a DNA molecule.
Down
1. Abbreviation for deoxyribonucleic acid.
2. The ‘A’ in DNA stands for this.
3. Number of chromosomes found in a normal human
cell.
4. Cytosine always bonds with this base.
6. A length of DNA that holds the instructions for a certain
characteristic.
7. Chromosomes are found in this part of a cell.
8. Type of reproduction that produces variation in the
offspring.
Build a DNA model
1. Cut out Spines A and B and all of the base pairs.
2. Fold down the tabs (grey boxes) so that they are at right angles to the
bases.
3. Put glue on one tab of each base pair and stick them onto spine A in
the numbered boxes (refer to diagram). You can attach the base
pairs in any order. Wait for the glue to set before proceeding.
You may also want to hold the base on with a paper clip or
clothes peg so it sticks well.
4. Once the glue is dry, put glue on the other tab of each base
and stick them to the corresponding numbered position on
spine B. You’ll have to support both spines while the glue is
drying. This is where paper clips or pegs will be a big help.
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