What specific trait in fly studies "demonstrate without doubt" that genes are on chromosomes? How did...
What specific trait in fly studies "demonstrate without doubt" that genes are on chromosomes? How did it show this?
Homework Answers
Sutton and Boveri have given the chromosomal theory of inheritance. This theory states that the hereditary units are present on the chromosomes of the individual as the behavior of the heredity units and chromosomes is similar.
In 1911, Thomas Hunt Morgan observed sex linkage of the eye color in fruit fly. Based on the experimental studies on the inheritance of the eye color, Morgan argued that the genes are on the chromosomes. His student Sturtevant used the phenomena of genetic linkage and showed that genes are linearly arranged on the chromosomes. They confirmed the chromosomal theory of inheritance. the inheritance of the eye color was depending on the sex of the parent. Because the sex is determined by the chromosomes, the gene for eye color must be there on the sex chromosomes. That is how the genes are confirmed to be present on the chromosomes.
His student Alfred Sturtevant has developed method to construct gene map on the chromosomes based on the recombination frequency.
When fruit flies were crossed they found that
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What specific trait in fly studies "demonstrate without doubt"
that genes are on chromosomes? How did...
trait. 8 A trait coded for by genes on chromosomes 1 through 22 is a/an 9...
trait. 8 A trait coded for by genes on chromosomes 1 through 22 is a/an 9 A trait coded for by either the X or the Y chromosome is a/an 10 A genetically simple trait is coded for by alleles at only 11 What is the term for a trait coded for by alleles at multiple loci? locus. trait. trait. 12 if the various phenotypes of a trait can be placed into categories, it is a/an 13 If you can...
9) What is the minimum number of genes needed to sustain life? How did researchers demonstrate...
9) What is the minimum number of genes needed to sustain life? How did researchers demonstrate that this minimum set of genes could sustain life?
A house fly has 12 homologous pairs of chromosomes. ignoring the effects of crossing over, how...
A house fly has 12 homologous pairs of chromosomes. ignoring the effects of crossing over, how many possible combinations of maternal and paternal chromosomes would be found in a fly's egg? show your calculations.
Genes A, B, C and D are on different chromosomes of a diploid species. What is...
Genes A, B, C and D are on different chromosomes of a diploid species. What is the probability of an ABCD gamete produced by a plant with the genotype AaBBCcDD? Can someone explain how to solve this?
from this reading, what did you find out? what facts did you learn from this? did...
from this reading, what did you find out? what facts
did you learn from this? did you already know this? was it
interesting to you?
When Mendel proposed that each trait is determined by a pair of genes, it presented a potential problem. If parents pass on both copies of a gene pair, then offspring would end up with four genes for each trait. Mendel deduced that sex cells — sperm and eggs — contain only one parental gene of...
UNIT 33 | Embryonic Development and Heredity 671 s. What is the specific function of the...
UNIT 33 | Embryonic Development and Heredity 671 s. What is the specific function of the two umbilical arteries? 2. Observe a fresh or preserved animal fetus and placenta, if available. Identify the following structures and then write a brief description of each a. Placenta b. Amnion (amniotic sac) c. Umbilical cord 蚰鷊 3. Observe a model of a pregnant human torso, if available Figre33-7 Human male karyotype with 23 pairs The placenta is located in which region of the...
What challenges did you overcome during your studies? How did you rise above them?
What challenges did you overcome during your studies? How did you rise above them?
What is the probability that for a particular trait, two heterozygous parents will both contribute a...
What is the probability that for a particular trait, two heterozygous parents will both contribute a recessive allele to their child? For a typical Mendelian trait with complete dominance how many different phenotypes are possible? For alleles that display incomplete dominance, how many phenotypes are possible? Some phenotypes appear to be expressed on a continuum. Several traits in this lab demonstrate this. If most genes have only two alleles, how can some phenotypes be so variable? Chin shape genes are...
(1) Explain the specific role of homeotic genes in controlling animal development; what specific aspect of...
(1) Explain the specific role of homeotic genes in controlling animal development; what specific aspect of development is controlled by homeotic genes, and how do they achieve this? (5 pts) (ii) Explain why a mutation to a homeotic gene can be an important macroevolutionary event. Your response should include a clear discussion of what macroevolution means and the type of evolutionary change associated with macroevolution (as opposed to microevolution), and why mutations to homeotic genes can result in macroevolution. (6...
Name Sex-linked traits are genetic char segments of DNA found on chromosomes that Sex-Linked Traits Senetic...
Name Sex-linked traits are genetic char segments of DNA found on chromosomes that Sex-Linked Traits Senetic characteristics determined by genes located on sex chromosomes. Genies are and on chromosomes that carry information for protein production and that are sponsible for the inheritance of specific traits Genes exist in alternative forms called alleics. or a trail is inherited from each parent Like traits originating from genes on autosomes (non-se chromosomes), sex-linked to omosomes), sex-linked traits are passed from parents to offspring...
trait. 8 A trait coded for by genes on chromosomes 1 through 22 is a/an 9 A trait coded for by either the X or the Y chromosome is a/an 10 A genetically simple trait is coded for by alleles at only 11 What is the term for a trait coded for by alleles at multiple loci? locus. trait. trait. 12 if the various phenotypes of a trait can be placed into categories, it is a/an 13 If you can...
from this reading, what did you find out? what facts
did you learn from this? did you already know this? was it
interesting to you?
When Mendel proposed that each trait is determined by a pair of genes, it presented a potential problem. If parents pass on both copies of a gene pair, then offspring would end up with four genes for each trait. Mendel deduced that sex cells — sperm and eggs — contain only one parental gene of...
UNIT 33 | Embryonic Development and Heredity 671 s. What is the specific function of the two umbilical arteries? 2. Observe a fresh or preserved animal fetus and placenta, if available. Identify the following structures and then write a brief description of each a. Placenta b. Amnion (amniotic sac) c. Umbilical cord 蚰鷊 3. Observe a model of a pregnant human torso, if available Figre33-7 Human male karyotype with 23 pairs The placenta is located in which region of the...
(1) Explain the specific role of homeotic genes in controlling animal development; what specific aspect of development is controlled by homeotic genes, and how do they achieve this? (5 pts) (ii) Explain why a mutation to a homeotic gene can be an important macroevolutionary event. Your response should include a clear discussion of what macroevolution means and the type of evolutionary change associated with macroevolution (as opposed to microevolution), and why mutations to homeotic genes can result in macroevolution. (6...
Name Sex-linked traits are genetic char segments of DNA found on chromosomes that Sex-Linked Traits Senetic characteristics determined by genes located on sex chromosomes. Genies are and on chromosomes that carry information for protein production and that are sponsible for the inheritance of specific traits Genes exist in alternative forms called alleics. or a trail is inherited from each parent Like traits originating from genes on autosomes (non-se chromosomes), sex-linked to omosomes), sex-linked traits are passed from parents to offspring...
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