Genetic recombination
... Inter-chromosomal – between nonhomologous chromosomes; Intra-chromosomal – between homologous chromosomes ...
... Inter-chromosomal – between nonhomologous chromosomes; Intra-chromosomal – between homologous chromosomes ...
THE CHROMOSOMAL BASIS OF INHERITANCE
... duplications, etc.) can cause genetic disorders. • How genetic imprinting and inheritance of mitochondrial DNA are exceptions to standard ...
... duplications, etc.) can cause genetic disorders. • How genetic imprinting and inheritance of mitochondrial DNA are exceptions to standard ...
Lecture 2a: Sex: Chromosomes
... Imprinting: Differential behavior of identical genes, depending on which parent contributed them. In extreme cases, some genes are transmitted from one sex in an active form and in the other sex in an inactive form, e.g., Prader-Willi syndrome, located on an autosome (Chromosome 15). The maternal co ...
... Imprinting: Differential behavior of identical genes, depending on which parent contributed them. In extreme cases, some genes are transmitted from one sex in an active form and in the other sex in an inactive form, e.g., Prader-Willi syndrome, located on an autosome (Chromosome 15). The maternal co ...
Chapter 12
... Sex chromosomes are nonidentical but still homologous Homologous chromosomes interact, then segregate from one another during meiosis ...
... Sex chromosomes are nonidentical but still homologous Homologous chromosomes interact, then segregate from one another during meiosis ...
1.2 Genes: Answers and Questions
... Chromosome – a thread-like structure made mostly of DNA, found in the nucleus of a cell DNA (deoxyribonucleic acid) – material found in the cell nucleus that contains genetic information Gene – a segment of DNA that controls protein production ...
... Chromosome – a thread-like structure made mostly of DNA, found in the nucleus of a cell DNA (deoxyribonucleic acid) – material found in the cell nucleus that contains genetic information Gene – a segment of DNA that controls protein production ...
Topic 8 - OoCities
... Alleles are shown side by side in dihybrid crosses (TtBb). In representing crosses involving linkage it is more comon to show them as vertical pairs: TB over tb. The TB is underlined and then there is a space, then there is a tb below it with a line above it. This will be how IB wants it on examinat ...
... Alleles are shown side by side in dihybrid crosses (TtBb). In representing crosses involving linkage it is more comon to show them as vertical pairs: TB over tb. The TB is underlined and then there is a space, then there is a tb below it with a line above it. This will be how IB wants it on examinat ...
PPT File
... This pedigree shows how one human trait—a white lock of hair just above the forehead—passes through three generations of a family. The allele for the white forelock trait is dominant. At the top of the chart is a grandfather who had the white forelock trait. Two of his three children inherited the t ...
... This pedigree shows how one human trait—a white lock of hair just above the forehead—passes through three generations of a family. The allele for the white forelock trait is dominant. At the top of the chart is a grandfather who had the white forelock trait. Two of his three children inherited the t ...
Transmission Genetics
... • Produced from germ cells in organs called gonads • In females ovaries produce eggs or ova • In males testes produce spermatozoa ...
... • Produced from germ cells in organs called gonads • In females ovaries produce eggs or ova • In males testes produce spermatozoa ...
sex linkage and disorders
... parents. By contrast, males inherit their single Xchromosome from their mothers and become red green color blind if this X-chromosome has the color perception defect. ...
... parents. By contrast, males inherit their single Xchromosome from their mothers and become red green color blind if this X-chromosome has the color perception defect. ...
1-RS_Genetics_Lecture-1-Molecular Basis of diseases_14Sep2014
... chromosomes in health and disease. Chromosome studies are an important laboratory diagnostic procedure in 1) prenatal diagnosis 2) certain patients with mental retardation and multiple birth defects 3) patients with abnormal sexual development 4) some cases of infertility or multiple miscarriages 5) ...
... chromosomes in health and disease. Chromosome studies are an important laboratory diagnostic procedure in 1) prenatal diagnosis 2) certain patients with mental retardation and multiple birth defects 3) patients with abnormal sexual development 4) some cases of infertility or multiple miscarriages 5) ...
Genetics unit study guide (notes)
... At the beginning of protein synthesis, just like DNA replication, the double helix structure of DNA uncoils in order for mRNA to replicate the genetic sequence responsible for the coding of a particular protein. This allows the mRNA to move in and transcribe (copy) the genetic information. Example: ...
... At the beginning of protein synthesis, just like DNA replication, the double helix structure of DNA uncoils in order for mRNA to replicate the genetic sequence responsible for the coding of a particular protein. This allows the mRNA to move in and transcribe (copy) the genetic information. Example: ...
Body cells
... 4.3 Now, you will learn: Why meiosis is necessary for sexual reproduction How cells and chromosomes divide during meiosis How meiosis differs from mitosis ...
... 4.3 Now, you will learn: Why meiosis is necessary for sexual reproduction How cells and chromosomes divide during meiosis How meiosis differs from mitosis ...
Inheritance and Meiosis File
... Genes (and therefor traits) are passed from parents to offspring on chromosomes Each individual gets two alleles for one trait: one allele from mother and one allele from father This confirmed Mendel’s work at the molecular level ...
... Genes (and therefor traits) are passed from parents to offspring on chromosomes Each individual gets two alleles for one trait: one allele from mother and one allele from father This confirmed Mendel’s work at the molecular level ...
Review - BrandtBRC
... Walter Sutton discovered that the sex cells of grasshoppers have • a. 12 times the number of chromosomes found in the body cells. • b. twice the number of chromosomes found in the body cells. • c. the same number of chromosomes found in the body cells. • d. half the number of chromosomes found in t ...
... Walter Sutton discovered that the sex cells of grasshoppers have • a. 12 times the number of chromosomes found in the body cells. • b. twice the number of chromosomes found in the body cells. • c. the same number of chromosomes found in the body cells. • d. half the number of chromosomes found in t ...
Meiosis and Fertilization
... Almost all the cells in your body were produced by mitosis. The only exceptions are the gametes – sperm or eggs – which are produced by a different type of cell division called meiosis. During fertilization the sperm and egg unite to form a single cell called the zygote which contains all the chromo ...
... Almost all the cells in your body were produced by mitosis. The only exceptions are the gametes – sperm or eggs – which are produced by a different type of cell division called meiosis. During fertilization the sperm and egg unite to form a single cell called the zygote which contains all the chromo ...
THE CHROMOSOMAL BASIS OF INHERITANCE
... • The unique pattern of inheritance in sexlinked genes. • How alteration of chromosome number or structurally altered chromosomes (deletions, duplications, etc.) can cause genetic disorders. • How genetic imprinting and inheritance of mitochondrial DNA are exceptions to standard ...
... • The unique pattern of inheritance in sexlinked genes. • How alteration of chromosome number or structurally altered chromosomes (deletions, duplications, etc.) can cause genetic disorders. • How genetic imprinting and inheritance of mitochondrial DNA are exceptions to standard ...
1-. During the first meiotic division (meiosis 1), (A) homologous
... only gamete C , and the brown coat parent can produce only gametes CB, the F 1 generation will all have genotype cY CB• Crossing two members of this generation would give you a ratio of 1 yellow coat:2 gray coats: 1 brown coat. This means that 25% of the offspring would have brown coats, 25% would h ...
... only gamete C , and the brown coat parent can produce only gametes CB, the F 1 generation will all have genotype cY CB• Crossing two members of this generation would give you a ratio of 1 yellow coat:2 gray coats: 1 brown coat. This means that 25% of the offspring would have brown coats, 25% would h ...
Mendelian Inheritance of Human Traits
... Red-Green Color Blindness • Common in males • People who have red-green color blindness can’t differentiate these two colors ...
... Red-Green Color Blindness • Common in males • People who have red-green color blindness can’t differentiate these two colors ...
Meiosis, or reduction division, is a special type of cell division
... 1. Interphase, stage of the G1 phase Inside the cell, note the nucleus with the nucleolus (1) and its nuclear membrane (2). The nucleus also contains the not yet helical DNA (3) with the genetic information. The cell itself receives its stability and shape from very fine tubes, the so-called microt ...
... 1. Interphase, stage of the G1 phase Inside the cell, note the nucleus with the nucleolus (1) and its nuclear membrane (2). The nucleus also contains the not yet helical DNA (3) with the genetic information. The cell itself receives its stability and shape from very fine tubes, the so-called microt ...
Genetics Unit Review 1. How are the steps of meiosis different from
... 4. What is nondisjunction and when (what stage) does it occur in meiosis? ...
... 4. What is nondisjunction and when (what stage) does it occur in meiosis? ...
Meiosis, or reduction division, is a special type of cell division
... 1. Interphase, stage of the G1 phase Inside the cell, note the nucleus with the nucleolus (1) and its nuclear membrane (2). The nucleus also contains the not yet helical DNA (3) with the genetic information. The cell itself receives its stability and shape from very fine tubes, the so-called microt ...
... 1. Interphase, stage of the G1 phase Inside the cell, note the nucleus with the nucleolus (1) and its nuclear membrane (2). The nucleus also contains the not yet helical DNA (3) with the genetic information. The cell itself receives its stability and shape from very fine tubes, the so-called microt ...
Mitosis and Meiosis Lab.
... cell" is conventional, but does not indicate the sex of the offspring cell.) Mitosis can occur in both diploid (2n) and haploid (n) cells; a diploid cell is shown below. ...
... cell" is conventional, but does not indicate the sex of the offspring cell.) Mitosis can occur in both diploid (2n) and haploid (n) cells; a diploid cell is shown below. ...
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).