QUESTIONS AND ANSWERS SECTION A: SIMILARITIES‚ DIFFERENCES‚ AND DEFINITIONS Gametes are mature haploid reproductive cells that unite to form a zygote that develops into a new individual. Gametes are also called sex cells. An egg or ovum is a haploid female reproductive cell or gamete whereas a sperm is a male haploid reproductive cell. A zygote is the initial cell that is formed as a result of the union of a male and a female gamete by means of sexual reproduction. The two haploid cells merge
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has non-disjunction and therefore two X chromosomes in it after going through the entire process of meiosis. If that egg is then fertilized by a sperm with an X chromosome from the father this would result in the XXX Triple-X syndrome. c. This syndrome can only be held “responsible” to both the parents chromosome contributions. The mother could achieve nondisjunction anywhere throughout meiosis to achieve the double XX chromosome in one of the final egg gametes. The father if had nondisjunction
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had explained the same result 35 years go. Resistance remained about Mendels laws until evidence had supported it. Chromosoems and genes are both present in pairs of diploid cells. Homologous chromosomes separate and alleles segregate during meiosis. Fertilization restores the paired condition for both chromosomes and genes. Around 1902‚ the chromosome theory of inheritance began to take form. Thomas Hunt Morgan was the first t associate a specific gene with a specific chromosome in the
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is RNA? How are the 3 types different in function? 17. How are triplet codes‚ codons‚ and amino acids related? 18. What is the purpose of mitosis? 19. Briefly describe what happens in each phase of mitosis? 20. What is the purpose of meiosis? 21. Explain the relationship between gametes‚ zygote‚ blastocyst‚ embryo and fetus. 1. Connective Tissue gives shape to organs and holds them in place. Blood and bones would be examples. Muscle cells form active contractile
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* Meiosis – cell division for gamete production * In specialized tissues * Produces cells with the 1n chromosome number * Two Divisions * Meiosis I separates homologous chromosomes * Meiosis II separates sister chromisis * Asexual Reproduction * Mitotic division * Identical offspring * Sexual Reproduction * Fuse gametes from parents (syngamy) to produce a zygote * Each parent contributes half the genetic material * Increase the diversity of
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Plant Kingdom (Biology) | Close | | Study Material | | Division Algae Classification within Angiosperms * Artificial system of classification * Given by Linnaeus * Based on vegetative characters and androecium structures * Gave equal importance to vegetative and sexual characteristics * Natural system of classification * Based on morphology‚ anatomy‚ embryology‚ and phytochemistry * Given by George Bentham and Joseph Dalton Hooker * Phylogenetic
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CHAPTER 29 Multiple Choice ALPHEBETIZED ________ is the most common type of fetal testing. Amniocentesis A chromosomal aberration in which part of a chromosome is lost is known as ________. deletion A female infant is born with several hundred oocytes‚ each one genetically unique. This is due to ________. independent assortment and random crossover An allele that can be masked or suppressed by another allele is said to be __________.Recessive A couple whose blood types are A (IAi) and B
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AP Biology Mid-Term Study Guide 2015 Monitha Patel Chemical Bonding Compounds Sharing of a pair of valence electrons by two or more different atoms Molecule Two or more atoms held together by covalent bonds Ionic Electron attraction between two atoms Cations (+1) and Anions (-1) attract Covalent Sharing of valance electrons between atoms Nonpolar Electrons are shared equally O2 Polar Covalent Unequal sharing of electrons between atoms Two hydrogen atoms are bonded to a single oxygen
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Which of the following is most likely to occur when a tumor-suppressor gene is mutated? - The tumor-suppressor gene and resulting protein may lose its function and ability to suppress cell proliferation. Mutations can produce a polypeptide with increased function. - TRUE ________can convert proto-oncogenes into oncogenes. - Nonsense mutations Most human embryos that are aneuploidy - are spontaneously aborted in the first trimester. Horses and donkeys are closely related species that can
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these deviations. The tendency of the loci on the same chromosome to remain linked together during meiosis and gametogenesis is referred to as linkage. Autosomal linkage : the loci are on the same chromosome‚ affecting the phenotypic and genotypic ratios of the offspring. Recombination can affect linkage by separating the two parental loci‚ this occurs during Prophase I of Meiosis. In sex linked ( X linked ) inheritance‚ alleles on sex chromosomes are inherited in predicable patterns
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