11.3 Notes
... Although meiosis is a precise mechanism that separates the two sex chromosomes of a diploid cell into single chromosomes of haploid gamete cells, errors sometimes do take place ...
... Although meiosis is a precise mechanism that separates the two sex chromosomes of a diploid cell into single chromosomes of haploid gamete cells, errors sometimes do take place ...
Cell cycle
... 1. deletion: if a fragment of a chromosome is lost. Usually cause serious physical and mental problems. Deletion of chromosome 5 causes cri du chat syndrome: child is mentally retarded, has a small head with unusual facial features, and has a cry that sounds like the mewing of a distressed cat ...
... 1. deletion: if a fragment of a chromosome is lost. Usually cause serious physical and mental problems. Deletion of chromosome 5 causes cri du chat syndrome: child is mentally retarded, has a small head with unusual facial features, and has a cry that sounds like the mewing of a distressed cat ...
triploid
... from a father combines with one that’s just “T” from a mother, to make a child with “Tt”. We have 2 haploid cells come together to make a new diploid person. ...
... from a father combines with one that’s just “T” from a mother, to make a child with “Tt”. We have 2 haploid cells come together to make a new diploid person. ...
BIOL0601 Practice Examination Key
... 2. Explain the differences between steroid and peptide hormones, and describe how they act upon their target cells. a. Steroid hormones have the core of four fused rings which characterizes a steroid. Peptide hormones have a core of a peptide or modified amino acid, and may have also have molecules ...
... 2. Explain the differences between steroid and peptide hormones, and describe how they act upon their target cells. a. Steroid hormones have the core of four fused rings which characterizes a steroid. Peptide hormones have a core of a peptide or modified amino acid, and may have also have molecules ...
Meiosis Lecture - Mayfield City Schools
... The fertilized egg is called a zygote and has one set of chromosomes from each parent The zygote produces somatic cells by mitosis and ...
... The fertilized egg is called a zygote and has one set of chromosomes from each parent The zygote produces somatic cells by mitosis and ...
Cell Division
... • Cell cycle: everything that happens from 1 cell division to the next – 2 parts 1. Interphase 2. Mitosis ...
... • Cell cycle: everything that happens from 1 cell division to the next – 2 parts 1. Interphase 2. Mitosis ...
Exam Study Guide
... 84. How many recessive alleles are necessary to see a recessive trait? 85. Rate each of the following as passive or active transport: osmosis, diffusion, facilitated diffusion, molecules moving from lesser concentration to greater concentration **You will be given different scenarios and will have t ...
... 84. How many recessive alleles are necessary to see a recessive trait? 85. Rate each of the following as passive or active transport: osmosis, diffusion, facilitated diffusion, molecules moving from lesser concentration to greater concentration **You will be given different scenarios and will have t ...
Ch. 12 Genetics
... Some genes are dominant some are recessive Dominant genes can mask recessive genes when one of each is inherited Some genes are not dominant or recessive but blend when inherited together ...
... Some genes are dominant some are recessive Dominant genes can mask recessive genes when one of each is inherited Some genes are not dominant or recessive but blend when inherited together ...
Lecture 1
... DNA duplexes that are organized into several chromosomes within the nucleus. • Consist of long continuous DNA molecule associated with small basic proteins called histones. • In eukarotic cells, there are normally two copies of each chromosome (homologous pairs) in every somatic cell. ...
... DNA duplexes that are organized into several chromosomes within the nucleus. • Consist of long continuous DNA molecule associated with small basic proteins called histones. • In eukarotic cells, there are normally two copies of each chromosome (homologous pairs) in every somatic cell. ...
Cell Reproduction
... strand of DNA. This DNA contains all the genetic information for creating and running the organism. The DNA is packaged by proteins bound to it. At different times, these proteins cause the DNA to be spread out like spaghetti in a bowl, or tightly condensed into the X-shaped chromosomes we can see ...
... strand of DNA. This DNA contains all the genetic information for creating and running the organism. The DNA is packaged by proteins bound to it. At different times, these proteins cause the DNA to be spread out like spaghetti in a bowl, or tightly condensed into the X-shaped chromosomes we can see ...
Ch. 12 Genetics - Cloudfront.net
... Some genes are dominant some are recessive Dominant genes can mask recessive genes when one of each is inherited Some genes are not dominant or recessive but blend when inherited together ...
... Some genes are dominant some are recessive Dominant genes can mask recessive genes when one of each is inherited Some genes are not dominant or recessive but blend when inherited together ...
Name - WW-P 4
... What are the steps of Translation (interpreting the genetic code into amino acids to make protein)? ...
... What are the steps of Translation (interpreting the genetic code into amino acids to make protein)? ...
Study Guide for Test
... 19. What are the sex chromosomes in a human female? ___________ male? _________ 20. In humans, the gene for color-blindness is sex-linked (X-linked) and recessive. Cross a normal vision heterozygous female ...
... 19. What are the sex chromosomes in a human female? ___________ male? _________ 20. In humans, the gene for color-blindness is sex-linked (X-linked) and recessive. Cross a normal vision heterozygous female ...
L10 Cellular Reproduction Mitosis Fa08
... • Normally activity of cell • Cell grows as it produces more contents of cell cytoplasm • Chromosome duplication occurs Fig. 12.5 ...
... • Normally activity of cell • Cell grows as it produces more contents of cell cytoplasm • Chromosome duplication occurs Fig. 12.5 ...
Bio 211
... Binary fission – the deets 1. At the start of the growth phase, the single prokaryo;c chromosome is usually a_ached at one point to the plasma membrane of the cell 2. During the growth phase, the DNA ...
... Binary fission – the deets 1. At the start of the growth phase, the single prokaryo;c chromosome is usually a_ached at one point to the plasma membrane of the cell 2. During the growth phase, the DNA ...
Cell Cycle & Cell Division
... identical halves called daughter cells In plant cells, cell plate forms at the equator to divide cell In animal cells, cleavage furrow forms to split cell ...
... identical halves called daughter cells In plant cells, cell plate forms at the equator to divide cell In animal cells, cleavage furrow forms to split cell ...
Ch. 8 Presentation
... Meiosis and mitosis are preceded by the duplication of chromosomes. However, – meiosis is followed by two consecutive cell divisions and – mitosis is followed by only one cell division. ...
... Meiosis and mitosis are preceded by the duplication of chromosomes. However, – meiosis is followed by two consecutive cell divisions and – mitosis is followed by only one cell division. ...
Mutation PPT
... goes wrong • When this happens the gamete may end up with an unusual number of chromosomes • This is called nondisjunction ...
... goes wrong • When this happens the gamete may end up with an unusual number of chromosomes • This is called nondisjunction ...
Name
... It is important to distinguish between homologous chromosomes and sister chromatids. As FIGURE 6.3 shows, homologous chromosomes are two separate chromosomes: one from your mother, one from your father. Homologous chromosomes are very similar to each other, since they have the same length and carry ...
... It is important to distinguish between homologous chromosomes and sister chromatids. As FIGURE 6.3 shows, homologous chromosomes are two separate chromosomes: one from your mother, one from your father. Homologous chromosomes are very similar to each other, since they have the same length and carry ...
Unit B2, B2.7 Mark scheme
... factor for colour has two forms accept gene for factor and allele for form ...
... factor for colour has two forms accept gene for factor and allele for form ...
Document
... 7.1 Chromosomes and Phenotype • The chromosome theory of inheritance follows Mendel’s laws of segregation and independent assortment. • We give much credit to Thomas Hunt Morgan and his work with fruit flies- Drosophilia melanogaster in the early 20th century – Wild vs mutant types – Sex linked gene ...
... 7.1 Chromosomes and Phenotype • The chromosome theory of inheritance follows Mendel’s laws of segregation and independent assortment. • We give much credit to Thomas Hunt Morgan and his work with fruit flies- Drosophilia melanogaster in the early 20th century – Wild vs mutant types – Sex linked gene ...
vocab-genetics - WordPress.com
... Define the term mutation and identify ways in which mutations may affect an organism. 10 Differentiate between the effect of gametic and somatic mutations 11 Describe the principles of dihybrid inheritance patterns and use these to predict the outcome of dihybrid inheritance problems. 12 Use core kn ...
... Define the term mutation and identify ways in which mutations may affect an organism. 10 Differentiate between the effect of gametic and somatic mutations 11 Describe the principles of dihybrid inheritance patterns and use these to predict the outcome of dihybrid inheritance problems. 12 Use core kn ...
4.1 Cell Division and Genetic Material pg. 160 The Cell Theory is a
... Mitosis (four phases of Nuclear division) Mitosis is the stage during which a cell’s nucleus and genetic material divide. Mitosis is made up of four phases. During Mitosis the genetic material (double number of chromosomes after replication) will be separated equally between two new forming daughte ...
... Mitosis (four phases of Nuclear division) Mitosis is the stage during which a cell’s nucleus and genetic material divide. Mitosis is made up of four phases. During Mitosis the genetic material (double number of chromosomes after replication) will be separated equally between two new forming daughte ...
Meiosis
Meiosis /maɪˈoʊsɨs/ is a specialized type of cell division which reduces the chromosome number by half. This process occurs in all sexually reproducing single-celled and multi-celled eukaryotes, including animals, plants, and fungi. Errors in meiosis resulting in aneuploidy are the leading known cause of miscarriage and the most frequent genetic cause of developmental disabilities. In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells each with half the number of chromosomes as the original parent cell. The two meiotic divisions are known as meiosis I and meiosis II. Before meiosis begins, during S phase of the cell cycle, the DNA of each chromosome is replicated so that it consists of two identical sister chromatids. In meiosis I, homologous chromosomes pair with each other and can exchange genetic material in a process called chromosomal crossover. The homologous chromosomes are then segregated into two new daughter cells, each containing half the number of chromosomes as the parent cell. At the end of meiosis I, sister chromatids remain attached and may differ from one another if crossing-over occurred. In meiosis II, the two cells produced during meiosis I divide again. Sister chromatids segregate from one another to produce four total daughter cells. These cells can mature into various types of gametes such as ova, sperm, spores, or pollen.Because the number of chromosomes is halved during meiosis, gametes can fuse (i.e. fertilization) to form a zygote with a complete chromosome count containing a combination of paternal and maternal chromosomes. Thus, meiosis and fertilization facilitate sexual reproduction with successive generations maintaining the same number of chromosomes. For example, a typical diploid human cell contains 23 pairs of chromosomes (46 total, half of maternal origin and half of paternal origin). Meiosis produces haploid gametes with one set of 23 chromosomes. When two gametes (an egg and a sperm) fuse, the resulting zygote is once again diploid, with the mother and father each contributing 23 chromosomes. This same pattern, but not the same number of chromosomes, occurs in all organisms that utilize meiosis. Thus, if a species has 30 chromosomes in its somatic cells, it will produce gametes with 15 chromosomes.