Patterns of Inheritance Worksheet
Explore the basics of heredity and genetic traits with this Grade 6 science worksheet on patterns of inheritance, including Punnett squares and dominant/recessive alleles.
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Patterns of Inheritance
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Read each question carefully and answer to the best of your ability. Show your work for any Punnett Square problems.
1. The study of how traits are passed from parents to offspring is called .
2. A characteristic that an organism can pass on to its offspring is called a .
3. Different forms of a gene are called .
4. A allele will always show up if it is present.
1. Which of the following best describes a recessive allele?
It is always expressed.
It is only expressed when two copies are present.
It is stronger than a dominant allele.
It is not a type of allele.
2. If 'T' represents the allele for tallness (dominant) and 't' represents the allele for shortness (recessive), which genotype would result in a tall plant?
tt
Tt
Both a and b
Only TT
Imagine a plant species where red flowers (R) are dominant over white flowers (r). Cross a homozygous dominant red flower (RR) with a white flower (rr).
1. Fill in the Punnett Square above.
2. What percentage of offspring will have red flowers?
3. What percentage of offspring will have white flowers?
1. All inherited traits are controlled by a single gene.
True
False
2. A genotype describes the physical appearance of an organism.
True
False
1. Explain the difference between homozygous and heterozygous genotypes.