Genetics Test
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The passing of traits from parents to offspring is? | hereditary
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| Different forms of the same gene are known as? | alleles
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| An organism has 2 identical alleles for a trait (such as SS) is? | purebred or homozygous
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| How many chromosomes are present in a human sex cell? | 23
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| What is found inside the nucleus that controls cell activites?? | DNA
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| What is the set of instructions for each characteristic that are donated by the parent to the offspring called? | Genes
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| The actual inherited combination of alleles (BB, Bb, bb) are known as the offsprings? | genotype
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| The organism's appearance is known as its? | phenotype
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| If the 2 pleants are crossed, Tt x Tt, what is the probability that the offspring plants will show the recessive trait? | 25%
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| When cells are not dividing, what stage of the cell cycle are the cells in? | Interphase
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| What are 2 functions of a chromosomes? | determine traits and control cell process.
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| In a DNA molecule, what bases pair together? | A and T & C and G
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| In a DNA strand, what are the sides of the "ladder" made of? | sugar and phosphate
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| In a DNA, what are the "rungs" of the ladder made of? | 4 types of bases
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| What would be the complimentary strand to this DNA sequence: TAGGCTA? | ATCCGAT
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| What is the purpose of meiosis? | To create 4 gametes/sex cells.
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| What is the purpose of mitosis? | To create 2 identical daughter cells.
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| What type of cell division do gametes undergo? | meiosis
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| If a plant cell has 20 chromosomes in its egg cell, how many chromosomes would its leaf cell contain? | 40 chromosomes
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| Why is mitosis important? | You end with 2 identical daughter cells.
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| What are the steps of mitosis? | Interphase, prophase, metaphase, anaphase, telophase.
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| How are sex cells different from other human cells? | Half the chromosomes
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| What does the genotype Tt mean to geneticists? | one dominant, 1 recessive
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| What does a Punnett square show? | possible outcome.
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| What is a heterozygous organism? | 2 different allels
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| Why do cells need to produce new cells? | replace old, dying cells.
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| What happens during telophase? | New cytoplasm forms
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| Genes are located on? | the chromosomes
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| If an organism has 40 chromosomes in its body cells, how many chromosomes would be in its egg cell? | 20 chromosomes
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| Why must daughter cells be identical to the parent cells? | To perform the same function.
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| How many chromosomes do human have? | 46
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| What happens during metaphase? | line up in the middle.
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| What happens during anaphase? | chromosomes seperate
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| How is asexual reproduction important to humans? | body cells
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| Before a cell divides, what must happen? | It must copy.
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| What is the order of the cell cycle? | IPMATC
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