Patterns of Inheritance
Explore the fundamental principles of heredity and genetics, including Mendelian inheritance, Punnett squares, and genetic terminology, suitable for Grade 8 science students.
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Patterns of Inheritance
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Which of the following is considered the basic unit of heredity?
Cell
Gene
Chromosome
Protein
2. An allele that is always expressed when present is called:
Recessive
Homozygous
Dominant
Heterozygous
3. The passing of traits from parents to offspring is called .
4. A Punnett square is used to predict the of offspring.
5. The genetic makeup of an organism is its .
6. Gregor Mendel is known as the 'Father of Genetics'.
True
False
7. A homozygous recessive genotype is represented by two different alleles (e.g., Tt).
True
False
8. What is the difference between a genotype and a phenotype?
9. A pea plant has a dominant allele for tallness (T) and a recessive allele for shortness (t). If a homozygous tall plant (TT) is crossed with a homozygous short plant (tt), what will be the genotype and phenotype of the offspring?
10. Observe the image of the DNA double helix below. Describe its key components and structure.
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