Question

homework: topic 4 lesson 1 describing genes and alleles
8th grade science
name:
date: 12/2
base your answers to questions 1 through 3 on the information below and your knowledge of science.
an adult human has 30 trillion human body cells. inside of each of those body cells there is a nucleus. the nucleus is known in the brain of the cell and controls all of the cell’s activities. stored within the nucleus are 46 x - shaped chromosomes. these 46 chromosomes are made of double helix (spiral) shaped dna.
dna is made of genes. human dna is made of 20,000 different genes! these genes carry traits, which are specific characteristics. human dna is made of 20,000 different genes!
(images: your body is made of cells; each cell has your chromosomes; every chromosome contains your dna; in your dna are your genes; your genes carry your traits)
1 categorize the following terms by writing them in the correct order from largest to smallest in the table below.
traits dna cells organism gene chromosome
(table with columns largest and rows for ordering)
2 predict: where do you think human offspring get their traits from?

Explanation:

Question 1

To determine the order from largest to smallest, we analyze the relationships: An organism (like a human) is made of cells. Each cell has a nucleus with chromosomes. Chromosomes are made of DNA. DNA contains genes, and genes carry traits. So the hierarchy is Organism (largest) → Cells → Chromosome → DNA → Gene → Traits (smallest).

Human offspring inherit traits from their parents. Parents pass on genes (through gametes - sperm and egg) that carry the instructions for traits. These genes are part of the DNA in chromosomes within cells, so offspring get traits from the genes inherited from both mother and father.

Answer:

Largest	Organism
	Chromosome
	DNA
	Gene
Smallest	Traits

Question 2