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Grade 7 Science: Heredity — Genes, Traits & Variation
Name
Date
1.
A ___ is a section of DNA that codes for a trait.
2.
Traits are passed from parents to ___ through heredity.
3.
Humans have 46 ___ in most body cells.
4.
Different forms of a gene are called ___.
5.
A ___ allele shows its effect when present.
6.
A ___ allele shows only when two copies are present.
7.
___ is differences among individuals in a population.
8.
Punnett squares predict possible ___ combinations.
9.
What is a gene?
10.
What is an allele?
11.
Explain dominant vs recessive.
12.
What is a Punnett square used for?
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