Name - AP Biology
... 1. A couple really wants to have at least one child of each sex. Their first three children are girls, so they feel certain that their next child will definitely be a boy. But…what are the chances of this offspring (or of any offspring) being a boy? 2. Hemophilia or “bleeder’s disease” is a recessiv ...
... 1. A couple really wants to have at least one child of each sex. Their first three children are girls, so they feel certain that their next child will definitely be a boy. But…what are the chances of this offspring (or of any offspring) being a boy? 2. Hemophilia or “bleeder’s disease” is a recessiv ...
Bio 102 Practice Problems Chromosomes, Karyotyping and Sex
... 9. A man with hemophilia (failure of blood to clot due to a recessive, sex-linked allele) has a daughter whose phenotype is normal. She marries a man whose phenotype is also normal. a. What is the probability that a son will have hemophilia? Explain. The woman's father had hemophilia, so if we use ...
... 9. A man with hemophilia (failure of blood to clot due to a recessive, sex-linked allele) has a daughter whose phenotype is normal. She marries a man whose phenotype is also normal. a. What is the probability that a son will have hemophilia? Explain. The woman's father had hemophilia, so if we use ...
The Biology and Evolution of Mammalian Y Chromosomes
... the Y chromosome: testis determination. In 1959, reports of 45,X females (Turner syndrome, with oocyte-depleted ovaries) and 47,XXY males (Klinefelter syndrome, with germ-cell-depleted testes) established the existence of a testis-determining gene on the human Y chromosome (32, 53), and the ensuing ...
... the Y chromosome: testis determination. In 1959, reports of 45,X females (Turner syndrome, with oocyte-depleted ovaries) and 47,XXY males (Klinefelter syndrome, with germ-cell-depleted testes) established the existence of a testis-determining gene on the human Y chromosome (32, 53), and the ensuing ...
2 introduction - diss.fu
... Monosomies are due to the presence of only one copy of a whole chromosome or a portion of it (partial monosomy) instead of two. Examples of human genetic disorders arising from monosomy are: Turner syndrome, where there is only one X chromosome instead of two for females or XY for males; Cri du chat ...
... Monosomies are due to the presence of only one copy of a whole chromosome or a portion of it (partial monosomy) instead of two. Examples of human genetic disorders arising from monosomy are: Turner syndrome, where there is only one X chromosome instead of two for females or XY for males; Cri du chat ...
Drosophila melanogaster
... Over time, more and more mutants have been found or created. In the days of classical genetic studies these differed in appearance. Nowadays mutants may have differences that are revealed only through biochemistry, with individual genes affected — so called ‘knockout’ flies. For breeding experiments ...
... Over time, more and more mutants have been found or created. In the days of classical genetic studies these differed in appearance. Nowadays mutants may have differences that are revealed only through biochemistry, with individual genes affected — so called ‘knockout’ flies. For breeding experiments ...
Readings Problems Background Week 8
... resembling the phage DNA (high AT, low GC) -- quite unlike that of its E. coli bacterial host, for which AT equals GC (Virology 2: 149-161, 1956; Biochim Biophys Acta 29: 536-544, 1958.) At the time, Volkin and Astrachan thought the labile RNA might be an intermediate for phage DNA synthesis althoug ...
... resembling the phage DNA (high AT, low GC) -- quite unlike that of its E. coli bacterial host, for which AT equals GC (Virology 2: 149-161, 1956; Biochim Biophys Acta 29: 536-544, 1958.) At the time, Volkin and Astrachan thought the labile RNA might be an intermediate for phage DNA synthesis althoug ...
Powerpoint Slides - Iowa State University
... Using Information about Genes to Interpret the Results of Microarray Experiments • Based on a large body of past research, some information is known about many of the genes represented on a microarray. • The information might include tissues in which a gene is known to be expressed, the biological ...
... Using Information about Genes to Interpret the Results of Microarray Experiments • Based on a large body of past research, some information is known about many of the genes represented on a microarray. • The information might include tissues in which a gene is known to be expressed, the biological ...
Reading (Homework)
... chromosomes, they have two alleles for any X-linked trait. Therefore, they must inherit two copies of the recessive allele to express the recessive trait. This explains why X-linked recessive traits are less common in females than males. An example of a recessive X-linked trait is redgreen color bl ...
... chromosomes, they have two alleles for any X-linked trait. Therefore, they must inherit two copies of the recessive allele to express the recessive trait. This explains why X-linked recessive traits are less common in females than males. An example of a recessive X-linked trait is redgreen color bl ...
Edouard van Beneden (Belgian, 1883)
... Can separate genes on same chromosome Can reshuffle genes – recombination percent constant for given gene pair – but different between different gene pairs ...
... Can separate genes on same chromosome Can reshuffle genes – recombination percent constant for given gene pair – but different between different gene pairs ...
Chapter-9-Chromosomes-and-DNA-Replication
... • From the time of conception our cells carry out mitosis.This allows us to make more and more cells and become bigger. Our cells also carry out mitosis if we need to repair damaged cells. Human sperm fertilising an egg. The fertilised eg will now be known as a ...
... • From the time of conception our cells carry out mitosis.This allows us to make more and more cells and become bigger. Our cells also carry out mitosis if we need to repair damaged cells. Human sperm fertilising an egg. The fertilised eg will now be known as a ...
Cell Reproduction - What It`s Like on the Inside
... Understand how genetic information (DNA) in the cell is encoded at the molecular level and provides genetic continuity between generations. Describe the role of chromosomes in reproduction (i.e., parents pass on chromosomes, which contain genes, to their offspring). Describe the possible results ...
... Understand how genetic information (DNA) in the cell is encoded at the molecular level and provides genetic continuity between generations. Describe the role of chromosomes in reproduction (i.e., parents pass on chromosomes, which contain genes, to their offspring). Describe the possible results ...
Evolution on the X chromosome: unusual patterns and processes
... pseudoobscura genome2. The values of Ka and Ks for alignable genes in this pair of species are similar for X-linked and autosomal loci2. Thornton and Long 42, on the other hand, studied duplicate gene pairs in the D. melanogaster genome, and observed that Ka /Ks values were significantly higher when ...
... pseudoobscura genome2. The values of Ka and Ks for alignable genes in this pair of species are similar for X-linked and autosomal loci2. Thornton and Long 42, on the other hand, studied duplicate gene pairs in the D. melanogaster genome, and observed that Ka /Ks values were significantly higher when ...
Dr. McKay`s lecture
... ‘Essentially complete’ as of December 1998 Contains ~100 million bp on 6 chromosomes Predicted to contain ~20, 000 genes. ~ 55% of these genes are similar to genes from other organisms. • ~ 20% associated with mutationally defined genetic loci ...
... ‘Essentially complete’ as of December 1998 Contains ~100 million bp on 6 chromosomes Predicted to contain ~20, 000 genes. ~ 55% of these genes are similar to genes from other organisms. • ~ 20% associated with mutationally defined genetic loci ...
WARM UP #17 A common error in meiosis in an egg
... 1. Interphase used to be considered the “resting” stage of the cell cycle. Why is this not correct? 2. Downside of being a clone?? WARM UP #17 A common error in meiosis in an egg (or a sperm) can result in trisomy, in which each somatic (normal) cell of the baby has 3 copies of one particular chromo ...
... 1. Interphase used to be considered the “resting” stage of the cell cycle. Why is this not correct? 2. Downside of being a clone?? WARM UP #17 A common error in meiosis in an egg (or a sperm) can result in trisomy, in which each somatic (normal) cell of the baby has 3 copies of one particular chromo ...
as a PDF
... over the length of the gene. A cycle of 6 steps is then postulated for the matching of each slave in turn against the master, namely: (1) breakage of the complementary chain of the slave at the terminus (non-operator) end of the gene; (2) dissociation of the chains of the slave over the length of th ...
... over the length of the gene. A cycle of 6 steps is then postulated for the matching of each slave in turn against the master, namely: (1) breakage of the complementary chain of the slave at the terminus (non-operator) end of the gene; (2) dissociation of the chains of the slave over the length of th ...
Document
... • All this information will be found in a key. • A male will be represented by a square • A female by a circle. • Those who are affected by the trait will have their circle or square filled in. • Those who carry it, will have half of it filled in. • And those who are normal, or don’t have it all, wi ...
... • All this information will be found in a key. • A male will be represented by a square • A female by a circle. • Those who are affected by the trait will have their circle or square filled in. • Those who carry it, will have half of it filled in. • And those who are normal, or don’t have it all, wi ...
View/Open
... the break. If they do not rejoin, the result is an acentric fragment, without a centromere, and a centric fragment, with a centromere. The centric fragment migrates normally during the division process because it has a centromere.The acentric fragment, however, is soon lost. It is subsequently exclu ...
... the break. If they do not rejoin, the result is an acentric fragment, without a centromere, and a centric fragment, with a centromere. The centric fragment migrates normally during the division process because it has a centromere.The acentric fragment, however, is soon lost. It is subsequently exclu ...
Problem Set 1 1. Name 4 important differences between mitosis and
... 3. The frequency of allele A is 0.6 and the frequency of the allele combination AB is 0.2. What is the probability that an individual with allele A also has allele B? ...
... 3. The frequency of allele A is 0.6 and the frequency of the allele combination AB is 0.2. What is the probability that an individual with allele A also has allele B? ...
Process of Meiosis
... KEY CONCEPT: During meiosis, diploid cells undergo two cell divisions that result in haploid cells. Vocabulary: 1. Sister chromatid (p. 173) – __________________________________________________________ 2. Gametogenesis (p. 176) – ____________________________________________________________ 3. Sperm ...
... KEY CONCEPT: During meiosis, diploid cells undergo two cell divisions that result in haploid cells. Vocabulary: 1. Sister chromatid (p. 173) – __________________________________________________________ 2. Gametogenesis (p. 176) – ____________________________________________________________ 3. Sperm ...
Schedule of Lecture and Laboratory Sessions
... 23. Define penetrance, expressivity, pleiotropy, multifactorial traits 24. Examine the effects of the environment on gene expression and phenotype (age on onset, sex, temperature and chemicals) 25. Describe the chromosomal theory of inheritance 26. Distinguish between autosomes and sex chromosomes 2 ...
... 23. Define penetrance, expressivity, pleiotropy, multifactorial traits 24. Examine the effects of the environment on gene expression and phenotype (age on onset, sex, temperature and chemicals) 25. Describe the chromosomal theory of inheritance 26. Distinguish between autosomes and sex chromosomes 2 ...
Stages of the Cell Cycle
... Telophase 4. Chromosome strands separate and move toward opposite ends of the cell. ______________ Anaphase 5. A copy of each chromosome is made. ________________ ...
... Telophase 4. Chromosome strands separate and move toward opposite ends of the cell. ______________ Anaphase 5. A copy of each chromosome is made. ________________ ...
X-inactivation
X-inactivation (also called lyonization) is a process by which one of the two copies of the X chromosome present in female mammals is inactivated. The inactive X chromosome is silenced by its being packaged in such a way that it has a transcriptionally inactive structure called heterochromatin. As nearly all female mammals have two X chromosomes, X-inactivation prevents them from having twice as many X chromosome gene products as males, who only possess a single copy of the X chromosome (see dosage compensation). The choice of which X chromosome will be inactivated is random in placental mammals such as humans, but once an X chromosome is inactivated it will remain inactive throughout the lifetime of the cell and its descendants in the organism. Unlike the random X-inactivation in placental mammals, inactivation in marsupials applies exclusively to the paternally derived X chromosome.