SLS Bio Genetics MT
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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| Allele | An alternative form of a gene.
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| Autosome | Any chromosome that is not a sex chromosome
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| codominance | A condition in which neither of two alleles of a gene is dominant or recessive.
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| dihybrid | A cross between individuals that have different alleles for the same gene
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| dominant allele | An allele whose trait always shows up in the organism when the allele is present.
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| genotype | An organism's genetic makeup, or allele combinations.
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| heterozygous | An organism that has two different alleles for a trait
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| homozygous | An organism that has two identical alleles for a trait
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| monohybrid | A cross between individuals that involves one pair of contrasting traits
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| multiple allele | A gene that has more than two alleles
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| phenotype | An organism's physical appearance, or visible traits.
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| punnet square | A chart that shows all the possible combinations of alleles that can result from a genetic cross
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| recessive allele | An allele that is masked when a dominant allele is present
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| sex chromosome | Chromosomes that determine the sex of an individual
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| sex-linked trait | a trait that is determined by a gene found on one of the sex chromosomes, such as the X chromosome or the Y chromosome in humans
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| test cross | the crossing of an individual of unknown genotype with a homozygous recessive individual to determine the unknown genotype
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| apoptosis | Programmed cell death
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| cell cycle | series of events that cells go through as they grow and divide
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| centriole | Cell organelle that aids in cell division in animal cells only
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| centromere | Area where the chromatids of a chromosome are attached
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| chromatin | Clusters of DNA, RNA, and proteins in the nucleus of a cell
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| chromosome | A threadlike, gene-carrying structure found in the nucleus. Each chromosome consists of one very long DNA molecule and associated proteins.
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| crossing-over | process in which homologous chromosomes exchange portions of their chromatids during meiosis
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| cytokinesis | Division of the cytoplasm during cell division
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| diploid (2n) | Are the cells in the end of Meiosis I Haploid (n) or Diploid (2n)
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| chromosome number | the number of chromosomes in a normal cell, in humans there are 23 pairs of chromosomes
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| gamete | Sex cell
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| haploid (n) | half the normal number of chromosomes; found in sex cells
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| homologous chromosomes | Chromosomes that have the same sequence of genes and the same structure
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| meiosis | Cell division that produces reproductive cells in sexually reproducing organisms
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| mitosis | A process of nuclear division in eukaryotic cells conventionally divided into five stages: prophase, prometaphase, metaphase, anaphase, and telophase.
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| nondisjunction | Error in meiosis in which homologous chromosomes fail to separate.
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| somatic cell | Any of the cells of a plant or animal except the reproductive cells.
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| synapsis | Pairing of homologous chromosomes
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Created by:
Marcus Tezinde
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