autosomal recessive trait that occurs due to the single base substitution in DNA. Second: Demonstrate this principle by showing the population proportions for autosomal recessive and dominant diseases below. A: Autosomal Recessive Disease. Do Punnett squares for the three possible crosses of the parents shown without doing ’back-crosses’ (i.e. do not cross‚ (aa x aa)‚ (Aa x Aa) ‚ or (AA x AA) ) Parents = AA‚ Aa‚ aa A a A AA Aa a aA aa A
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allele from each parent. The males are wingless‚ which is a recessive allele represented by a lowercase f. Their genotype is ff. A Punnett square can be used to predict whether their offspring are winged or wingless. The offspring are called the first filial generation (F₁)‚ while their offspring are called the second filial generation‚ or F₂. F₁ Generation Punnett Square: F F f f
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next generation. He also states that the inheritance of each trait is determined by genes that are passed on unchanged. So as the CF gene is not present‚ it becomes present depending on the ratio of genes as it passes down. 2. What would a Punnett square that shows how the son in generation IV (marked with an A) inherited cystic fibrosis look like? C- not a carrier of CF c- carrier | |c |c | |C |Cc |Cc | |c |cc |cc |
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trait. (Aa * Aa) Product Rule - the probability or chance that two or more independent events will occur together is the product of their individual probabilities of occurring alone. Punnett Square - simple grid used to illustrate all possible combinations of gametes from a given set of parents. (See "Punnett Square 08-01-13.png") Genotype - genetic makeup of an organism. It remains constant throughout an individual’s life‚ and is indicated by a combination of letters. Phenotype - the physical
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Homework #24 (130222): Chapter 14 (due Friday 130222) Total points: 20 for Attempt on all questions ONE Concept Map: 10 points Objectives Gregor Mendel’s Discoveries 1. Explain how Mendel’s particulate mechanism differed from the blending theory of inheritance. • Blending: parents genes mixed • Particulate: parents genes still retain identity\ The blending theory was that genetic material contributed by the two parents mixes in a manner analogous to the way blue and yellow make green
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gene. Now this can mean that you may be the carrier of the disease‚ but not actually have the disease. According to Mendel a trait may not show up in someone but still may be able to pass that trait on to the next generation. 2. What would a Punnett square that shows how the son in generation IV (marked with an A) inherited cystic fibrosis look like? The son in generation IV shows that he is homozygous recessive since the disease is recessive‚ because the parents do not have cystic fibrosis
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phenotypic ratios may be influenced by dominance of one allele compared to another. When an organism produces its gametes by meiosis‚ the alleles separate. This is Mendel¡¦s First Law-the Law of Segregation. This experiment investigated the effects of complete and incomplete dominance on the behavior of two different genes for chlorophyll production in tobacco. Two sets of approximately 50-100 tobacco seeds were planted for one week. The plants were the F2 result of two sets of monohybrid F1 crosses Gg
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generations. In this pedigree the parents don’t have cystic fibrosis but the child does. Both parents are heterozygous because the cystic fibrosis allele is recessive‚ but the children of these parents can inherit the allele. 2. What would a Punnett square that shows how the son in generation IV (marked with an A) inherited cystic fibrosis look like? A- Not a carrier of cystic fibrosis a- Carrier of cystic fibrosis | | A | a | | A | AA | Aa | | a
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Determine the types of gametes produced by each of the following individuals: a. Aa 1/2 A‚ 1/2 a b. AaBb 1/4 AB‚ 1/4 Ab‚ 1/4 aB‚ 1/4 ab c. AABb 1/2 AB‚ 1/ Ab d. AaBBCc 1/4 ABC‚ 1/4 aBC‚ 1/4 ABc‚ 1/4 aBc 2. Use the Punnett square to determine the genotypes in the progeny of each of the following crosses: a. Dd x Dd b. AaBB x AaBB c. CcEE x CCEe Notice: in every case‚ each parent produces only two types of gametes. [pic] 3. In guinea pigs
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SCI206 Unit 3 Individual Project American Intercontinental University SCI206-1001A-13 Abstract This assignment discusses the relationships between reproduction‚ heredity and DNA. Genetics – From Genes to Proteins‚ Mutations During transcription‚ the information in the DNA of a specific gene is copied into mRNA (messenger RNA)‚ which creates a nucleotide sequence. After transcription‚ if the DNA base sequence is 3’-TACCCTTTAGTAGCCACT-5’‚ then the base sequence of mRNA would be 5 ’-AUGGGAAAUCAUCGGUGA-3’
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