Gregor Mendel Reading Assignment Lab: Observable Human Genetic Traits (on paper) Trait Selfpollination Crosspollination Pure P1 generation F1 generation F2 generation Dominant Recessive Law of segregation Law of independent assortment allele B. Genetic Crosses (92) ★ Use punnet squares to predict the phenotype and genotype of offspring ○ complete dominance ○ incomplete dominance ○ codominance ○ sexlinked ○ polygenic ★ Apply our knowledge of genetics/punnet squares to blood
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heterozygous taster. T=taster t=non-taster TT x Tt T T t G: 2/4 TT 2/4 Tt 1:1 T TT TT Tt Tt P: 4/4 Tasters 1:0 Albinism – lack of pigment – is caused by a recessive allele. Cross an albino with a heterozygous‚ normally pigmented person (remember to choose your letters using the letter of the dominant allele) N=normal pigment n=albino nn x Nn n N n n Nn Nn nn nn G: 2/4 Nn‚ 2/4 nn 1:1 P: 2/4 Normal 2/4 albino 1:1 Cross a homozygous roller (tongue‚ of course) with a heterozygous
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hereditary determinants are of a particulate nature. These determinants are called genes. Each parent has a gene pair in each cell for each trait studied. The F1 from a cross of two pure lines contains one allele for the dominant phenotype and one for the recessive phenotype. These two alleles comprise the gene pair. One member of the gene pair segregates into a gamete‚ thus each gamete only carries one member of the gene pair. Gametes unite at random and irrespective of the other gene pairs involved
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interest. a. What is the trait? (1 point) widows peak b. What is the phenotype for the trait? Is this the dominant or recessive allele for the trait? (2 points) A widows peak is dominant‚ (B) c. What are the possible genotypes for the parents? (2 points) The possible genotypes would be BB or Bb d. Include the results of one Punnett square‚ showing a possible combination between alleles for the trait from the parents by filling in the genotypes according to the numbers in the square‚ below. B‚ b B‚ BB‚ Bb
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shaped oddly which results in pain because it is hard for the blood to travel throughout the body and anemia because of the lack of oxygen in the blood. A person can only have this disease if both parents are carriers and they receive two recessive alleles. There are five effects of the disease at different levels. At the DNA level the mutation causes the sequence to be coded GTG‚ CAC instead of GAG‚ CTC which results in a mutant protein. At the protein level the hemoglobin clump together which makes
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phenotypes of each generation were recorded and a chi-square test was performed. The F1 offspring were almost entirely standard form‚ and the F2 followed the Mendelian ratio of three standard to one rosette. This supported the idea that the rosette allele is recessive to the standard form‚ and that it follows Mendel’s law of segregation. INTRODUCTION The Brassica rapa is also known as a Wisconsin Fast Plant. This is because the plants complete their life cycle in approximately 35 to 45 days
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Period 4 Codominance Essential Question Why do offspring have different phenotypes from their parents or siblings? A Purpose Explore codominance by investigating the inheritance of sickle cell disease within a family. B Introduction Codominant alleles are both expressed in a persons phenotype.A heterozyygous will have the traits associated with both alleles.In this lab‚you will explore codominance by analyzing the results for the sickle cell disease within a family C Background Sickle cell disease
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Chapter 10 Foundations of Genetics Lecture Notes 1 Foundations of Genetics Mendel and the Garden pea The father of modern Genetics is Gregor Mendel. Gregor Mendel (1822-1884) was an Austrian monk who lived in a monastery where the experiments with the garden pea were performed. Mendel’s work with the garden pea was the fundamental study which unveiled the laws that govern genetics and heredity. Mendel was the first to use the scientific method in a very systematic and analysed his results
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have homozygous alleles for blue eyes. My dad has AA and my mom has aa. While my dad has homozygous for freckles and my mom had heterozygous. My dad has no freckles so he has aa‚ while my mom has tons of freckles so she has Aa. The capitol A’s represent the dominant traits and the lower case a’s represent the recessive traits. Since my dad has homozygous dominant‚ he passed on his dominant allele to me and my brother. While my mom can either pass on a dominant or recessive allele to me and my brother
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Darker eye color genes are more dominant than lighter eye color genes. Each parent can only give one gene from each trait. The father inherited a brown eye gene and a blue eye gene. However‚ the father passed down the brown eye gene to its offspring. The mother inherited a green eye gene and a blue eye gene. Based on evidence‚ one can come to the conclusion that the mother will pass a green eye gene to the offspring. As a result‚ the offspring will have a brown a gene and a green eye gene.
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