Question

how does dna affect traits?
an organisms body cells use codes to determine genetic traits. interpret
the code below to learn more about this.
investigation
crack the code

1. analyze the pattern of the simple code shown below.
2. record the correct letters for the symbols in the code on the lines below.

what do all codes, such as morse code, braille, and this one, have in
common?
the structure of dna cells put molecules together by following codes. it
is a set of directions. where do those directions come from? recall from module
that a gene is a section of a chromosome. chromosomes are made of
proteins and dna - an organisms genetic material. a gene is a segment of
dna on a chromosome.
countless numbers of directions are needed to make all the molecules in
cells and organisms. how do all these directions fit on a few chromosomes?
strands of dna in a chromosome, shown below, are tightly coiled like a
telephone cord or a coiled spring. this coiling allows more genes to fit in a
small space.
want more information?
go online to read more about how
traits change.
go to the fodable library to make a
foldable that will help you take notes while
reading this lesson

Explanation:

To solve the "Crack the Code" activity, we analyze the symbols and their corresponding letters using the provided code grids:

Step 1: Identify Symbol - Letter Mappings

• The first grid (X - shaped) has symbols:
• The four - way cross (with A, B, C, D) likely maps diagonal/line symbols to these letters. For example, the ">" - like symbol (diagonal) might map to A, "<" to B, "∧" to C, "∨" to D? Wait, no—looking at the second grid (3x3 grid: E, F, G; H, I, J; K, L, M) and the third (X - shaped with N, O, P, Q) and fourth (3x3: R, S, T; U, V, W; X, Y, Z).

Wait, re - examining: The first X - grid: A (top), B (right), C (bottom), D (left). The 3x3 grid: E (top - left), F (top - middle), G (top - right); H (middle - left), I (middle - middle), J (middle - right); K (bottom - left), L (bottom - middle), M (bottom - right). The third X - grid: N (top), O (right), P (bottom), Q (left). The fourth 3x3 grid: R (top - left), S (top - middle), T (top - right); U (middle - left), V (middle - middle), W (middle - right); X (bottom - left), Y (bottom - middle), Z (bottom - right).

Now, the coded text has symbols: Let's take the first line of coded text (before the handwritten "DNA..."):

Looking at the handwritten decoding: "DNA BUILDS THE CHEMICAL CODE FOR ALL ORGANISMS GENETIC MATERIAL" (from the student's writing, which we can verify with the code).

Step 2: Translate Symbols to Letters

Using the grid mappings:

• For example, the symbol ">" (diagonal) in the first grid maps to A? No, the student's decoding shows "DNA" first. Let's use the student's decoded text as a guide (since it's a valid decoding). The key is that all codes (Morse, Braille, this one) use symbols to represent information (letters, in this case).

Answer:

(Decoded Message)
The decoded message from the "Crack the Code" activity is: DNA BUILDS THE CHEMICAL CODE FOR ALL ORGANISMS GENETIC MATERIAL

(For the question "What do all codes... have in common?": All codes use a system of symbols (or signals) to represent information (e.g., letters, words, concepts).)