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27 Cards in this Set
- Front
- Back
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characteristic chromosome complement of a eukaryote species
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karyotype
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Characteristics include short stature, webbed neck, shield chest, underdeveloped breasts and widely spaced nipples, rudimentary ovaries, brown nevi
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Turner's syndrome
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XO genotype
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Turner's syndrome
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XXY genotype
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Kleinfelter's syndrome
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Characteristics include tall stature, poor beard growth, minor breast development, female pubic hair pattern, and testicular atrophy
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Kleinfelter's syndrome
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failure of chromosome pairs to separate properly during cell division
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nondisjunction
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common cause of changes in chromosome numbers
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nondisjunction during gametogenesis
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sterile heifer, born twin to a bull; female with a masculinized behavior and non-functioning ovaries
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freemartin
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Why is a freemartin sterile?
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Sterilized in utero by hormones from a male twin, becoming an infertile partial intersex.
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an individual that developed from a single fertilized egg (embryo)and which is composed of both male and female genotype cells (sexual mosaic)
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gyandromorph
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an individual formed from two different cell lines or the fusion of two non-identical fertilized eggs (embryos), but which is composed of cells that all hve the genotype of one sex (male or female)
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chimera
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loop (step #4)
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interphase chromatin
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rosette (step #5)
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leptotene of prophase I
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chromatid/chromosome (step #7)
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pachytene of prophase I
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5 steps of Prophase I
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1. Leptotene
2. Zygotene 3. Pachytene 4. Diplotene 5. Diakenesis |
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more than one chiasma
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chiasmata
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chiasmata "slips off end" during anaphase
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terminalization
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diploid division that results in 2 new diploid cells
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mitosis
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diploid division that results in 4 new haplid cells
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meiosis
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abnormal number of chromosomes
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aneuploidy
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disruptions in the normal chromosomal content of a cell, and are a major cause of genetic conditions in humans
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chromosomal aberrations
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Genotype XYY
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Supermale
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Genotype XXX
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Superfemale
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the means by which you can differentiate between autosomal and sex-linked traits
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reciprocal cross
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Spermatogonium -> Spermatid
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Spermatocytogenesis, "genetic"
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Spermatid -> spermatozoan
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Spermiogenesis
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loss of cytoplasm, addtion of flagellum and acrosome
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spermiogenesis
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