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37 Cards in this Set
- Front
- Back
the science of heredity
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genetics
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an organism having the same genes for a particular trait
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purebred
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the transfer of pollen from the anther of one flower to the stigma of another
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cross-pollination
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all the traits inherited by an organism
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heredity
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a unit of DNA which determines traits
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gene
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the female part of a flower
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pistil
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a gene which produces its effect even though an opposite gene is present
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dominant gene
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the resulting offspring from a cross between two individuals differing in one or more genes
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hybrid
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a condition in which neither gene dominates the other; a blended effect is produced
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incomplete dominance
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a gene which does not produce its effect when an opposite dominant gene is present
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recessive gene
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the upper portion of a stamen, containing pollen grains
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anther
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a characteristic carried by a gene
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trait
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Pretend you are repeating Mendel's work. You cross a purebred tall garden pea with a dwarf pea. What will the first generation look like?
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all tall
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In the second experiment of Mendel's work, you cross a dwarf garden pea with another dwarf pea. What will the first generation of peas look like?
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all dwarf
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Next, you cross a purebred smooth pea with a purebred wrinkled pea. What will the first generation of peas look like? ______ % smooth peas
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100
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Cross a yellow pea with a green pea. What percent of the peas would be yellow in the first generation? ______%
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100
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If the chromosome number of a garden pea is fourteen, how many chromosomes are within the egg cell?
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7
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The blood of an organism is responsible for passing genes from parent to child.
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false
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During which time period did Gregor Mendel conduct his experiments?
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about 1850
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Why is each characteristic or trait represented by two genes?
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Each parent contributes one gene.
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A trait which results from two dominant genes is called
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purebred
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The sensory nerve endings in the tongue are called
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taste buds
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What were the results of Mendel's scientific investigations?
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1 the understanding of genetics
2 varieties could be explained by inheritance 3 new varieties result from parent's genes |
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A trait which is formed from a blend of genes represents
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incomplete dominance
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A recessive gene cannot be hidden by a dominant one.
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false
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Punnett Squares are helpful for studying genetics.
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true
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Mendel's dwarf pea plants were always purebred dwarfs (tt).
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true
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The science of heredity agrees with the Genesis account of each after its kind.
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true
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Garden peas are self-pollinated.
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true
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is cell division in which two new cells have the same number of chromosomes as the old cel
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Mitosis
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The stigma is:
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he part of a flower that receives pollen
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The receptacle is:
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the stalk of the flower
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An undeveloped plant or animal is called:
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an embryo
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Pollen is located in the:
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anther
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In a garden pea whose chromosome number is fourteen, meiosis would produce:
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new cells with half the number of chromosomes
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If a leaf of a garden pea is damaged, the cells are replaced by:
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mitosis
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A pollen grain contains:
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the sperm cell
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