Learn on PengiLife Science (Grade 7)Chapter 4: Patterns of Heredity

Lesson 1: Living things inherit traits in patterns.

Inherited traits pass from parents to offspring through genes on chromosomes. Unlike acquired traits (learned behaviors), inherited traits are coded in DNA and determine physical characteristics.

Section 1

Genes Transfer Traits from Parents to Offspring

Inherited traits pass from parents to offspring through genes on chromosomes. Unlike acquired traits (learned behaviors), inherited traits are coded in DNA and determine physical characteristics.

Section 2

Mendel Discovered Patterns in Plant Inheritance

Gregor Mendel experimented with pea plants and found that traits can disappear in one generation but reappear in the next. This led to understanding dominant and recessive traits.

Section 3

Dominant Alleles Mask Recessive Traits

When two different alleles exist for a trait, the dominant version shows in the phenotype (observable characteristics). Recessive alleles only appear when two copies are present in the genotype.

Section 4

Parents Pass Different Allele Combinations to Children

Children receive one allele from each parent for every trait. This explains how two brown-haired parents can have a blond child if both parents carry the recessive blond allele.

Book overview

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Chapter 4: Patterns of Heredity

  1. Lesson 1Current

    Lesson 1: Living things inherit traits in patterns.

  2. Lesson 2

    Lesson 2: Patterns of heredity can be predicted.

  3. Lesson 3

    Lesson 3: Meiosis is a special form of cell division.

Lesson overview

Expand to review the lesson summary and core properties.

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Section 1

Genes Transfer Traits from Parents to Offspring

Inherited traits pass from parents to offspring through genes on chromosomes. Unlike acquired traits (learned behaviors), inherited traits are coded in DNA and determine physical characteristics.

Section 2

Mendel Discovered Patterns in Plant Inheritance

Gregor Mendel experimented with pea plants and found that traits can disappear in one generation but reappear in the next. This led to understanding dominant and recessive traits.

Section 3

Dominant Alleles Mask Recessive Traits

When two different alleles exist for a trait, the dominant version shows in the phenotype (observable characteristics). Recessive alleles only appear when two copies are present in the genotype.

Section 4

Parents Pass Different Allele Combinations to Children

Children receive one allele from each parent for every trait. This explains how two brown-haired parents can have a blond child if both parents carry the recessive blond allele.

Book overview

Jump across lessons in the current chapter without opening the full course modal.

Continue this chapter

Chapter 4: Patterns of Heredity

  1. Lesson 1Current

    Lesson 1: Living things inherit traits in patterns.

  2. Lesson 2

    Lesson 2: Patterns of heredity can be predicted.

  3. Lesson 3

    Lesson 3: Meiosis is a special form of cell division.