Name: ______________________________________________________ Period:_____ Chapter Review: 10 Mendel & Meiosis College Biology 1. An organism that is true breeding for a trait is said to be (a) homozygous (b) heterozygous (c) a monohybrid (d) a dihybrid 2. At the end of meiosis‚ how many haploid cells have been formed from the original cell? (a) one (b) two (c) three (d) four 3. When Mendel transferred pollen from one pea plant to another‚ he was ___ the plants. (a) self pollinating
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GAUTENG DEPARTMENT OF EDUCATION SENIOR SECONDARY INTERVENTION PROGRAMME LIFE SCIENCES GRADE 12 SESSION 3 (LEARNER NOTES) Page 1 of 10 TOPIC 1: MENDEL’S 1ST LAW‚ SEX AND BLOOD GROUP DETERMINATION Learner Note: Mendel’s Laws are very important and you must understand the basic concepts of Genetics. You must understand the concepts of dominance and how this plays a role in monohybrid crosses (mono = one = one characteristic or trait). Be aware of confusing the word ‘cross/ crossing’ with ‘crossing
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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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phenotype. Therefore genotypes GG and Gg phenotypically are green. When mutant allele g is homozygous for it‚ gg‚ no chlorophyll is present and the plants phenotypically are albino. Therefore an expected phenotypic ratio would be 3:1. Another gene at a different locus also affects chlorophyll production. This gene also has two sets of alleles‚ but in this case the mutant of this allele‚ Cy‚ exhibits incomplete dominance with the other. Genotype CgCg is phenotypically green. Genotype CyCy is phenotypically
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Guanine. Since this base pairing is specific‚ if one knows the sequence of bases a long one strand of the DNA one will also know the strand of the DNA one will also know the sequence along the complimentary strand. How does an organism’s genotype determine its phenotype? The phenotype is an organism in a class to which that organism belongs as determined by the description of the physical and behavioral. Because of the Characteristics of the organism for example the size and shape‚ its metabolic
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Lab 9 Elizabeth Stassenko 11/25/14 Plant Genetics Purpose: To predict and to identify the genotype of offspring using a Punett Square Exercise 1: Observing a Monohybrid Cross Hypothesis using Punett square: Gametes X x X XX Xx x Xx xx Data: Questions: A. What are the predicted ratios of the phenotypes in the plants? I predicted ¾ will germinate as green and ¼ will germinate as yellow B. What was the total number of seeds that germinated? 80 C.
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difference between an organism’s genotype and their phenotype? A genotype is the alleles of a gene that determine the appearance an individual receives from their parents. The appearance of an individual is called its phenotype. 9. What is a punnet square used for? The punnet square is used to visualize the possible results from a cross between a true-breeding purple plant and a true-breeding white plant. 10. Solve the following genetic crosses. **Include the genotype and phenotype ratios. a.
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but as we shall see the events are somewhat different. To understand the physical processes involved in meiosis‚ we will use pipe cleaners as models of chromosomes. The first step will be to determine the types of chromosomes that exist and the genotype and phenotype of the cell. We will then
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ECO EVO Study Guide Major Themes: Darwin’s Postulate 1. Heritable variation – (genotype) models of 1-3 loci‚ usually 2 alleles‚ produce heritable phenotypes 2. Organisms engage in a struggle for existence – per capita growth rates from survival and reproduction 3. Heritable traits influence outcome of the struggle – variation affects the struggle; phenotypes (determined by genotypes) influence per capita growth rates 3 Big Questions Biologists seek to answer: 1. Diversity
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No‚ the results would be different. While self pollination produces 3 : 1 ratio of yellow versus gene phenotype‚ cross pollination would result in 1 : 1 ratio‚ in the F2. This is because F1 yellow are heterozygous‚ while green are homozygous genotypes. 2. In the right-hand part of Figure 2-4‚ in the plant showing an 11 : 11 ratio‚ do you think it would be possible to find a pod with all yellow peas? All green? Explain. Answer: Yes‚ it is possible to find a pod with only yellow peas or
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