Genes and Chromosomes
Grade 7 · Science · Genetics and Heredity · Nevada, USA
Lesson Summary
Learn how DNA is organized into genes and chromosomes that carry your genetic information.
Explanation
A gene is a section of DNA that contains the instructions for one specific trait, like eye color or blood type. Genes are located on chromosomes, which are tightly coiled bundles of DNA. Humans have 46 chromosomes arranged in 23 pairs—one set from each parent. Different species have different numbers of chromosomes. Because you inherit chromosomes from both parents, you get a mix of traits from each one.
Practice Questions
Q1: How many chromosomes do human body cells have?
Answer: Human body cells have 46 chromosomes, arranged in 23 pairs.
Q2: What is the relationship between genes and chromosomes?
Answer: Genes are sections of DNA that code for specific traits, and they are located on chromosomes. Each chromosome carries many genes.
Q3: Why do you inherit traits from both parents?
Answer: Because you receive one set of 23 chromosomes from your mother and one set from your father, giving you genes from both parents.
People Also Ask
What is Genes and Chromosomes in Grade 7 Science?+
Genes and Chromosomes is a lesson in the Genetics and Heredity chapter of Grade 7 Science. It is part of the Nevada, USA school curriculum and covers key concepts that students need to understand at this level.
What grade level covers Genes and Chromosomes?+
Genes and Chromosomes is taught in Grade 7 as part of the Science curriculum in Nevada, USA.
How can I help my child with Genetics and Heredity in Science?+
Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Genetics and Heredity topics.