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19 Cards in this Set
- Front
- Back
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A hawk has wings. Does this statement describe a feature or trait?
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feature
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The ______ is the visible characteristics of an organism.
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phenotype
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A ______ trait is the stronger trait in genetics.
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dominant
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How many new cells are produced in meiosis?
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four
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The rod-shaped cell structure that directs the activities of the cell and passes on the traits of a cell to new cells is called a ______.
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chromosome
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A(n) _______ offspring is one that contains a dominant gene and a recessive gene for a trait.
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heterozygous or hybrid
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______ was the first person who studied heredity and started the science of genetics.
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Gregor Mendel
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The percentage of offspring with the dominant trait if both parents are homozygous dominant is _______.
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100%
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The normal human body cell contains _______ chromosomes in the nucleus.
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46
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Some giraffes have longer necks than others. Is this statement describing a feature or trait?
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trait
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When nitrogen bases pair up to form the DNA code, thymine always bonds with what other nitrogen base?
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adenine
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In the genotype Bb, b represents which gene, dominant or recessive?
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recessive
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The ______ is the basic unit of heredity.
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gene
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_____ is the duplication and division of the nucleus of a cell and the information of two new daughter cells.
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mitosis
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______ is the genetic makeup of an organism.
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genotype
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______ is the condition that occurs when a gene is neither dominant or recessive.
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incomplete dominance
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______ is the process that results in cells with only half the normal number of chromosomes.
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meiosis
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If there are 18 chromosomes in the body cell of an animal, how many chromosomes are in its sex cells?
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9
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In fruit flies, Red eyes (R) are dominant to White eyes (r). What would the be genotype of a heterozygous red eyed fly?
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Rr
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