Sem 1 Revision Chem and Biol File
... Recessive gene: a gene masked by another and does not show. Two alleles are required to show trait. Dominant gene: a gene that is expressed over other genes. Only 1 allele is required to show trait. DNA: Deoxyribonucleic acid. Chemical making up a chromosome. Haploid: number of chromosome from one g ...
... Recessive gene: a gene masked by another and does not show. Two alleles are required to show trait. Dominant gene: a gene that is expressed over other genes. Only 1 allele is required to show trait. DNA: Deoxyribonucleic acid. Chemical making up a chromosome. Haploid: number of chromosome from one g ...
Document
... 5. On what structure are genes found? 6. Label the following items on the chromosome below (centromere, genes, chromatid) ...
... 5. On what structure are genes found? 6. Label the following items on the chromosome below (centromere, genes, chromatid) ...
LECTURE 14 Plant Reproduction I. Introduction to haploid and
... I. Introduction to haploid and diploid life stages. 1. The life cycle of all plants has two stages – haploid and diploid. a. The diploid stage means that there are two sets of chromosomes. Abbreviated as 2n. b. The haploid stage means that there is only one set of chromosomes. Abbreviated as 1n. c. ...
... I. Introduction to haploid and diploid life stages. 1. The life cycle of all plants has two stages – haploid and diploid. a. The diploid stage means that there are two sets of chromosomes. Abbreviated as 2n. b. The haploid stage means that there is only one set of chromosomes. Abbreviated as 1n. c. ...
DNA, RNA, & Meiosis Review
... 3. One strand of the DNA is used as a template to make complementary mRNA ...
... 3. One strand of the DNA is used as a template to make complementary mRNA ...
File - Mr. Banks
... flower color is codominant. ___________________________________________________________ Explain what would happen if a purebred black cow was crossed with a purebred white cow if the gene for cow fur color is incomplete dominant. ___________________________________________ What does DNA stand for? _ ...
... flower color is codominant. ___________________________________________________________ Explain what would happen if a purebred black cow was crossed with a purebred white cow if the gene for cow fur color is incomplete dominant. ___________________________________________ What does DNA stand for? _ ...
Mosaicism - Birmingham Women`s Hospital
... and the genes they carry, are copied so that each new cell has an identical set of chromosomes. ...
... and the genes they carry, are copied so that each new cell has an identical set of chromosomes. ...
Chromosomal abnormalities
... number of chromosomes such as having a single extra chromosome (47), or a missing chromosome (45). • Aneuploid (not good) karyotypes are given names with the suffix somy (rather than -ploidy, used for euploid karyotypes), such as trisomy and monosomy. ...
... number of chromosomes such as having a single extra chromosome (47), or a missing chromosome (45). • Aneuploid (not good) karyotypes are given names with the suffix somy (rather than -ploidy, used for euploid karyotypes), such as trisomy and monosomy. ...
Genetics 3 – Aneuploidies and Other Chromosome
... • Tetrasomy - gain of two chromosomes can be tolerated Downs Syndrome • Overall incidence at birth is approx 1 in 650 to 1 in 700 • Strong association between incidence and advancing maternal age:20 years, 1 in 1500; 30 years, 1 in 900 40 years, 1 in 100; 45 years, 1 in 30 There are 3 possible cause ...
... • Tetrasomy - gain of two chromosomes can be tolerated Downs Syndrome • Overall incidence at birth is approx 1 in 650 to 1 in 700 • Strong association between incidence and advancing maternal age:20 years, 1 in 1500; 30 years, 1 in 900 40 years, 1 in 100; 45 years, 1 in 30 There are 3 possible cause ...
Chapter 12 – The Cell Cycle
... 6. Humans have 46 chromosomes. That number of chromosomes will be found in C – the somatic cells (pg 219) 7. Sister chromatids C – each have their own kinetochore (pg 222) 8. Which of the following would not be exhibited by cancer cells? C – density dependent inhibition (pg 231) 9. Which of the foll ...
... 6. Humans have 46 chromosomes. That number of chromosomes will be found in C – the somatic cells (pg 219) 7. Sister chromatids C – each have their own kinetochore (pg 222) 8. Which of the following would not be exhibited by cancer cells? C – density dependent inhibition (pg 231) 9. Which of the foll ...
3-Chromo abn
... number of chromosomes such as having a single extra chromosome (47), or a missing chromosome (45). • Aneuploid (not good) karyotypes are given names with the suffix somy (rather than -ploidy, used for euploid karyotypes), such as trisomy and monosomy. ...
... number of chromosomes such as having a single extra chromosome (47), or a missing chromosome (45). • Aneuploid (not good) karyotypes are given names with the suffix somy (rather than -ploidy, used for euploid karyotypes), such as trisomy and monosomy. ...
to Chromosomal Abnormalities ppt
... number of chromosomes such as having a single extra chromosome (47), or a missing chromosome (45). • Aneuploid (not good) karyotypes are given names with the suffix somy (rather than -ploidy, used for euploid karyotypes), such as trisomy and monosomy. ...
... number of chromosomes such as having a single extra chromosome (47), or a missing chromosome (45). • Aneuploid (not good) karyotypes are given names with the suffix somy (rather than -ploidy, used for euploid karyotypes), such as trisomy and monosomy. ...
File
... (2)_____ sex chromosome. The male sex cell is called the (3)____________________ and could carry the (4)_____ or (5)_____ sex chromosome, and therefore, determines the sex of the baby. There are 46 chromosomes in normal body cells, but only (6)______ chromosomes in the sex cells. When the male sex c ...
... (2)_____ sex chromosome. The male sex cell is called the (3)____________________ and could carry the (4)_____ or (5)_____ sex chromosome, and therefore, determines the sex of the baby. There are 46 chromosomes in normal body cells, but only (6)______ chromosomes in the sex cells. When the male sex c ...
10-11_the_story_of_conception
... (2)_____ sex chromosome. The male sex cell is called the (3)____________________ and could carry the (4)_____ or (5)_____ sex chromosome, and therefore, determines the sex of the baby. There are 46 chromosomes in normal body cells, but only (6)______ chromosomes in the sex cells. When the male sex c ...
... (2)_____ sex chromosome. The male sex cell is called the (3)____________________ and could carry the (4)_____ or (5)_____ sex chromosome, and therefore, determines the sex of the baby. There are 46 chromosomes in normal body cells, but only (6)______ chromosomes in the sex cells. When the male sex c ...
Lecture 7 – PDF
... age, but only in females; inflection point in human females is around 40 years of age 1. Essentially a “storage effect -- sperm are turned over every 20 or so days, whereas eggs are generated, held at meiosis I, and stored 2. Because the increase is in nondisjunction, there also is an increased inci ...
... age, but only in females; inflection point in human females is around 40 years of age 1. Essentially a “storage effect -- sperm are turned over every 20 or so days, whereas eggs are generated, held at meiosis I, and stored 2. Because the increase is in nondisjunction, there also is an increased inci ...
Week 12 - Biology
... Hybrid G was produced by selective breeding. Individual plants from pure lines of A and B were selected (for size of cobs) and crossed to produce hybrid E. Similarly, individual plants from pure lines of C and D were selected and crossed to produce hybrid F. Plants from hybrids E and F were then sel ...
... Hybrid G was produced by selective breeding. Individual plants from pure lines of A and B were selected (for size of cobs) and crossed to produce hybrid E. Similarly, individual plants from pure lines of C and D were selected and crossed to produce hybrid F. Plants from hybrids E and F were then sel ...
Gene-linkage and Karyotype
... Gene Linkage • Linked genes – Usually inherited together because located near each other on the SAME chromosome • Genes closer together on the same chromosome are more often inherited together ...
... Gene Linkage • Linked genes – Usually inherited together because located near each other on the SAME chromosome • Genes closer together on the same chromosome are more often inherited together ...
Spindle
... equator of the spindle and chromatids are attached by centromeres to a separate spindle fiber. ____________________: centromeres split and the chromatid pairs of each chromosome are pulled apart by microtubules. ____________________: final phase of mitosis during which new cells prepare for their ow ...
... equator of the spindle and chromatids are attached by centromeres to a separate spindle fiber. ____________________: centromeres split and the chromatid pairs of each chromosome are pulled apart by microtubules. ____________________: final phase of mitosis during which new cells prepare for their ow ...
Document
... 4. Sex chromosomes are the ____ pair and a females carries ________, while a male carries _______. 5. It is the ___________ that determines the sex of a child. 6. Body cells have 2 copies of each chromosome, so they are _____________ ( ). Sex cells are _______________ ( ), meaning they only have one ...
... 4. Sex chromosomes are the ____ pair and a females carries ________, while a male carries _______. 5. It is the ___________ that determines the sex of a child. 6. Body cells have 2 copies of each chromosome, so they are _____________ ( ). Sex cells are _______________ ( ), meaning they only have one ...
Chapter 11 Powerpoint File
... Objectives • What happens during the events of meiosis? • What is the difference between mitosis and meiosis? ...
... Objectives • What happens during the events of meiosis? • What is the difference between mitosis and meiosis? ...
AP Biology
... 5. Calculate the percentage of cells in each phase. Record in Table 7.2. 6. It takes on average 24 hours (1,440 minutes) for onion root tip cells to complete the cell cycle. Calculate the amount of time spent in each phase of the cell cycle from the percentage of cells in that stage during one life ...
... 5. Calculate the percentage of cells in each phase. Record in Table 7.2. 6. It takes on average 24 hours (1,440 minutes) for onion root tip cells to complete the cell cycle. Calculate the amount of time spent in each phase of the cell cycle from the percentage of cells in that stage during one life ...
Chapter 12 Study Guide - Maples Elementary School
... person who inherited an A allele from one parent and O allele from the other. What would the blood type of that person be? SHOW YOUR WORK! What kinds of things (tests) can be done to determine the risks of passing on a genetic disorder to one’s children? What is genetic counseling? While studying se ...
... person who inherited an A allele from one parent and O allele from the other. What would the blood type of that person be? SHOW YOUR WORK! What kinds of things (tests) can be done to determine the risks of passing on a genetic disorder to one’s children? What is genetic counseling? While studying se ...
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).