OCR GCSE (9-1) Biology Lesson Element Mitosis and Meiosis
... The activity is about mitosis and meiosis in animal cells. This activity is designed to access higher order thinking, analysing and creating skills. Learners should know that nucleus of a cell contains genetic information. They should be aware what a gene, chromosome and DNA are. They should also ha ...
... The activity is about mitosis and meiosis in animal cells. This activity is designed to access higher order thinking, analysing and creating skills. Learners should know that nucleus of a cell contains genetic information. They should be aware what a gene, chromosome and DNA are. They should also ha ...
• Recognize Mendel`s contribution to the field of genetics. • Review
... Review the factors affecting the phenotypes of Mendelian characters and provide examples for each: incomplete dominance, co-dominance & multiple allele, pleiotropy, polygenic inheritance, environmental effect, and epigenetics. Explain how gender is determined in mammals. Explain X-inactivation and w ...
... Review the factors affecting the phenotypes of Mendelian characters and provide examples for each: incomplete dominance, co-dominance & multiple allele, pleiotropy, polygenic inheritance, environmental effect, and epigenetics. Explain how gender is determined in mammals. Explain X-inactivation and w ...
Evolutionary Anthropology
... 1915 Thomas Hunt Morgan, an American geneticist, presents results from experiments with fruit flies that prove genes are lined up along chromosomes. He also describes the principle of “linkage” and lays the groundwork for gene mapping. ...
... 1915 Thomas Hunt Morgan, an American geneticist, presents results from experiments with fruit flies that prove genes are lined up along chromosomes. He also describes the principle of “linkage” and lays the groundwork for gene mapping. ...
Mendel`s Laws Haldane`s Mapping Formula
... • If there is an even number of crossovers between two sites, they wind up on the same gamete. The net effect is no recombination. • If there is an odd number of crossovers between sites, they recombine. • AB = event “recombination between A & B” = “odd # of crossovers between A & B” ...
... • If there is an even number of crossovers between two sites, they wind up on the same gamete. The net effect is no recombination. • If there is an odd number of crossovers between sites, they recombine. • AB = event “recombination between A & B” = “odd # of crossovers between A & B” ...
Mendelian Genetics Student Objectives
... ● The student is able to describe representations and models that illustrate how genetic information is copied for transmission between generations. ● The student is able to describe representations and models illustrating how genetic information is translated into polypeptides. Essential knowledge ...
... ● The student is able to describe representations and models that illustrate how genetic information is copied for transmission between generations. ● The student is able to describe representations and models illustrating how genetic information is translated into polypeptides. Essential knowledge ...
Genetic Mutations
... • Every cell in that baby’s body will have __ copies of this chromosome instead of___. • This condition is called ____________. • Trisomy 21 = Individual has _____ copies of chromosome # ________ ...
... • Every cell in that baby’s body will have __ copies of this chromosome instead of___. • This condition is called ____________. • Trisomy 21 = Individual has _____ copies of chromosome # ________ ...
Sex Determination & Sex
... The Y chromosome is much smaller than the X. It carries a small number of genes, most of which are ...
... The Y chromosome is much smaller than the X. It carries a small number of genes, most of which are ...
Cell Cycle and Mitosis The Key Roles of Cell Division 1. Explain
... Distinguish among benign, malignant, and metastatic tumors. ...
... Distinguish among benign, malignant, and metastatic tumors. ...
Understanding Inheritance Content Practice B LESSON 2
... Directions: On the line before each statement, write the letter of the correct answer. ...
... Directions: On the line before each statement, write the letter of the correct answer. ...
S13Set #1
... present at metaphase I. a. How many chromosomes would the hybrid progeny have in each somatic cell? b. The production of viable but sterile offspring indicates that mitosis can proceed normally in these hybrid cells, but meiosis cannot. Briefly explain these observations in light of the differences ...
... present at metaphase I. a. How many chromosomes would the hybrid progeny have in each somatic cell? b. The production of viable but sterile offspring indicates that mitosis can proceed normally in these hybrid cells, but meiosis cannot. Briefly explain these observations in light of the differences ...
Chromosome, genes and DNA Task 1 chromos
... Teaching notes and answers This activity sheet can be used to introduce the topic of chromosomes, genes and DNA (with teacher explanation) or could be used as part of a recap lesson. It covers the basic structure of chromosomes, genes and DNA and some key facts. Task 3 is a dominoes game which could ...
... Teaching notes and answers This activity sheet can be used to introduce the topic of chromosomes, genes and DNA (with teacher explanation) or could be used as part of a recap lesson. It covers the basic structure of chromosomes, genes and DNA and some key facts. Task 3 is a dominoes game which could ...
Genetics - FW Johnson Collegiate
... One of the pairs are called the “sex chromosomes”. These determine what sex we are Males have an XY pair, females have an XX pair The other 22 pairs are called the “autosomes” or “somatic chromosomes’ Who you are is determined by two factors: i) Heredity (your genetic makeup) ii) Environment ...
... One of the pairs are called the “sex chromosomes”. These determine what sex we are Males have an XY pair, females have an XX pair The other 22 pairs are called the “autosomes” or “somatic chromosomes’ Who you are is determined by two factors: i) Heredity (your genetic makeup) ii) Environment ...
three mitosis and meiosis
... Sordaria jimicola is an ascomycete fungus that can be used to demonstrate the results of crossing over during meiosis. Sordaria is a haploid organism for most of its life cycle. It becomes diploid only when the fusion of the mycelia (filamentlike groups of cells) of two different strains results in ...
... Sordaria jimicola is an ascomycete fungus that can be used to demonstrate the results of crossing over during meiosis. Sordaria is a haploid organism for most of its life cycle. It becomes diploid only when the fusion of the mycelia (filamentlike groups of cells) of two different strains results in ...
Created with Sketch. Genetics - true or false
... While there are a few traits that are due to a single gene (for example, dimples and cleft chin), most traits are complex and are the result of the interactions between the protein products of several genes. All humans have almost exactly the same genes, in the same order, along our chromosomes. Our ...
... While there are a few traits that are due to a single gene (for example, dimples and cleft chin), most traits are complex and are the result of the interactions between the protein products of several genes. All humans have almost exactly the same genes, in the same order, along our chromosomes. Our ...
Gene Mutation
... Tumour evolution inferred by single-cell sequencing. Nature 472, 90–94 (2011) Mosaic Copy Number Variation in Human Neurons. Science 342, 632 (2013) ...
... Tumour evolution inferred by single-cell sequencing. Nature 472, 90–94 (2011) Mosaic Copy Number Variation in Human Neurons. Science 342, 632 (2013) ...
Human Inheritance
... • Males will always show a recessive trait located on the X chromosome because he only has 1 X. • Females can be carriers for sex-linked recessive disorders. – A carrier someone who has the defective allele, but doesn’t show the trait. ...
... • Males will always show a recessive trait located on the X chromosome because he only has 1 X. • Females can be carriers for sex-linked recessive disorders. – A carrier someone who has the defective allele, but doesn’t show the trait. ...
Nov07-BalancersFinal
... even if the visible marker is not close by on the chromosome. Inversion heterozygote can form loop structure upon meiosis pairing. A crossover that occurs within the loop will produce gametes with duplication and deletion chromosomes, including acentric and dicentric fragments. Both acentric and dic ...
... even if the visible marker is not close by on the chromosome. Inversion heterozygote can form loop structure upon meiosis pairing. A crossover that occurs within the loop will produce gametes with duplication and deletion chromosomes, including acentric and dicentric fragments. Both acentric and dic ...
Slide 1
... – Two identical cells arise from one cell – Steps in the process – A single circular chromosome duplicates, and the copies begin to separate from each other – The cell elongates, and the chromosomal copies separate ...
... – Two identical cells arise from one cell – Steps in the process – A single circular chromosome duplicates, and the copies begin to separate from each other – The cell elongates, and the chromosomal copies separate ...
Complex Patterns of Inheritance
... guidance that informs people about genetic problems that could affect them or their offspring ...
... guidance that informs people about genetic problems that could affect them or their offspring ...
Unit 1 Topic 5 - Holy Cross Collegiate
... No individual plant or animal lives forever. Plants and animals exist today because their ancestors reproduced, either sexually or asexually. Remember that asexual reproduction requires only a single cell, such as a bacterium, to divide by binary fission. This process allows an organism to produce ma ...
... No individual plant or animal lives forever. Plants and animals exist today because their ancestors reproduced, either sexually or asexually. Remember that asexual reproduction requires only a single cell, such as a bacterium, to divide by binary fission. This process allows an organism to produce ma ...
Human Inheritance
... • Males will always show a recessive trait located on the X chromosome because he only has 1 X. • Females can be carriers for sex-linked recessive disorders. – A carrier someone who has the defective allele, but doesn’t show the trait. ...
... • Males will always show a recessive trait located on the X chromosome because he only has 1 X. • Females can be carriers for sex-linked recessive disorders. – A carrier someone who has the defective allele, but doesn’t show the trait. ...
Chapter 7 test -
... b. Mitosis produces new cells that are genetically identical to the parents. c. Sexual reproduction combines genetic information from two different individuals and results in cells that contain two copies of each gene. d. Inheritance results in traits being transmitted from one generation to another ...
... b. Mitosis produces new cells that are genetically identical to the parents. c. Sexual reproduction combines genetic information from two different individuals and results in cells that contain two copies of each gene. d. Inheritance results in traits being transmitted from one generation to another ...
GENETICS The Science of Heredity
... E. Codominance 1. some alleles are not dominant or recessive 2. both alleles are expressed in offspring 3. codominant alleles are are written with a superscript, for example…go to pg. 93 ...
... E. Codominance 1. some alleles are not dominant or recessive 2. both alleles are expressed in offspring 3. codominant alleles are are written with a superscript, for example…go to pg. 93 ...
Ploidy
Ploidy is the number of sets of chromosomes in a cell. Usually a gamete (sperm or egg, which fuse into a single cell during the fertilization phase of sexual reproduction) carries a full set of chromosomes that includes a single copy of each chromosome, as aneuploidy generally leads to severe genetic disease in the offspring. The gametic or haploid number (n) is the number of chromosomes in a gamete. Two gametes form a diploid zygote with twice this number (2n, the zygotic or diploid number) i.e. two copies of autosomal chromosomes. For humans, a diploid species, n = 23. A typical human somatic cell contains 46 chromosomes: 2 complete haploid sets, which make up 23 homologous chromosome pairs.Because chromosome number is generally reduced only by the specialized process of meiosis, the somatic cells of the body inherit and maintain the chromosome number of the zygote. However, in many situations somatic cells double their copy number by means of endoreduplication as an aspect of cellular differentiation. For example, the hearts of two-year-old children contain 85% diploid and 15% tetraploid nuclei, but by 12 years of age the proportions become approximately equal, and adults examined contained 27% diploid, 71% tetraploid and 2% octaploid nuclei.Cells are described according to the number of sets present (the ploidy level): monoploid (1 set), diploid (2 sets), triploid (3 sets), tetraploid (4 sets), pentaploid (5 sets), hexaploid (6 sets), heptaploid or septaploid (7 sets), etc. The generic term polyploid is frequently used to describe cells with three or more sets of chromosomes (triploid or higher ploidy).