What are the possible genotypes for each? What are the possible gametes that can be produced by each? Because Mary’s phenotype expression is dominant it is possible for Mary to have several variations of genotypes which would possess the dominant allele which could be either homozygous or heterozygous whereas John’s recessive phenotype could only be present through a homozygous recessive genotype. The possible genotypes for Mary would include the homozygous dominant (NN) or a heterozygous (Nn) while
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Determining the Crossover Frequency in Sordaria fimicola Introduction Meiosis is an important part of the life cycle that gives rise to the genetic variation in offsprings. Meiosis in fungi differs from those in plants and animals. Fungi are composed of hyphae‚ which are tubules that make up the frame. These hyphae together form a clump or a mat that is the mycelium (Campbell‚ 637). The hyphae are key to fungus reproduction. Typically fungi produce large amounts of spores through either sexual
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Drosophila Melanogaster Introduction Drosophila mature through complete metamorphosis‚ as do all members of the order Diptera. [5] Diptera are commonly known as (true: having two wings) flies and include many familiar insects such as mosquitoes‚ black flies‚ midges‚ fruit flies‚ and house flies. [3] Drosophila melanogaster are most commonly known as fruit flies and are used in many genetic studies for a few simple reasons; they are small and easily handled‚ they have a short life cycle
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Abstract The basic principle of Mendelian inheritance was studied using the fruit fly‚ Drosophila Melanogaster. A Cinnabar Brown female was crossed with Wild Type male. The flies were mated in a jar containing a nutrient medium and then placed in an incubator. The experiment was conducted over a period of 5 weeks. Cinnabar (cn) and brown (bw) are two loci in Drosophila with recessive eye colour mutations. Mutations in cn cause a bright red eye and mutations in bw cause a brown eye. Double mutants
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population at genetic equilibrium‚ the frequency of allele A is 0.5. a. What is the frequency of the homozygous dominant genotype (AA)? b. What is the frequency of the heterozygous genotype (Aa)? 2. If 16% of the individuals in a population at genetic equilibrium are recessive (aa). a. What is the frequency of the recessive allele in the population? b. What is the frequency of the dominant allele? 3. If the genotype frequencies in
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initial gene pool. The light beans represent the F alleles‚ and the dark beans represent the f alleles. This is the gene pool produced by mating between heterozygous (Ff) and homozygous normal (FF) individuals. Use the following to determine the number of dominant alleles in the population and the same formula to determine the number of recessive alleles in the population. number of offspring with genotype FF (two dark beans) _____ × 2 = _____ F alleles number of offspring with genotype Ff (one dark
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following. 1. Distinguish genetic drift from gene flow in terms of how they occur and their implications for future genetic variation in a population. Genetic drift‚ defined as the process in which chance events cause unpredictable fluctuations in allele frequencies from one generation to the next‚ can increase or decrease variability within particularly small populations. Certain genotype/phenotype frequencies‚ for example‚ may be reduced or completely eliminated through chance events. Examples of
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stripes. These green stripes show that the starfish can morph into other marine animal. Starfish are given this characteristic by a recessive allele. * A) What is the frequency of the genotype of individuals in the population born with green stripes? * B) What is the frequency of the dominant allele? * C) What is the frequency of the recessive allele? * D) What is the frequency of the carriers in the population? Question 2 9 out of 1800 leprechauns are born with brown hair‚ whereas
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facility. Lethal alleles are those that fail to successfully code for the proper production of a functional protein that is vital for life. Recessive lethal alleles are mutations that are only lethal to homozygotic individuals with two copies of the mutated allele (Castle‚ 1910) . In humans cystic fibrosis and sickle cell anemia are two examples of recessive lethal alleles. A dominant lethal allele is a mutation that is lethal to any individual that has one or two copies of the allele. Huntington’s
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been pink. The F1 were all red‚ but white flowers appeared in the F2‚ proving that ______________. a. the genetic material was particulate. b. the red allele is dominant. c. the white allele is recessive. d. the red and white alleles are syntenic. e. the blending theory is correct. 2. The western honey bee or European honey bee (Apis mellifera) is a species of honey bee. The genus Apis is Latin for
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