Lecture3quiz - Lecture 3 I Meiosis(end A Animal Gametogenesis B Plant Alteration of Generations II Mendelian Revolution A Experimental Design 1 Choice

Lecture3quiz - Lecture 3 I Meiosis(end A Animal...

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Lecture 3 I. Meiosis (end) A. Animal Gametogenesis B. Plant Alteration of Generations II. Mendelian Revolution A. Experimental Design 1. Choice of model system 2. Choice of discrete characters 3. Choice of controls (true breeding lines and balanced design) 4. Quantification of results
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Lecture 3 III. Monohybrid cross A. Concept of recession- Particulate Inheritance B. Reciprocal cross C. Binomial expansion- Principal of Segregation D. Concept of Genotype vs. Phenotype-Test Cross IV. Dihybrid Crosses and the Principle of Independent Assortment
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Many animals, including humans, arrest oogenesis at early Prophase I.
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Question 3 If the amount of DNA in the precursor cell is X before S phase in oogenesis, how much DNA does the secondary oocyte have? A. X B. 2X C. X/2 D. X/4
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Question 4 What is the ploidy of the secondary oocyte? A. Diploid B. Tetraploid C. Haploid
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Question 5 Are the genotypes of the ootid and the secondary polar body identical? Yes No
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Alternating Generations
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Male Angiosperm Gametophyte
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Question 6 Are the genotypes of the egg cell and the polar nuclei identical in the plant embryo sac? Yes No
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Female Shark Reproduced Without Male DNA, Scientists Say By HENRY FOUNTAIN Published: May 23, 2007 A hammerhead shark that gave birth in a Nebraska aquarium reproduced without mating, a genetic analysis shows…. Instead, the female shark’s own genetic material combined during the process of cell division that produces an egg. A cell called the secondary oocyte, which contains half the female chromosomes and normally becomes the egg, fused with another cell called the secondary polar body….
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  • Winter '14
  • Monohybrid Cross, polar body

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