bicoid target genes
... normally repress expression of the“leg gene” Distalless in the abdominal segments Distalless in wild-type ...
... normally repress expression of the“leg gene” Distalless in the abdominal segments Distalless in wild-type ...
A Closer Look at Conception presentation
... Sperm: Male Egg: Female These cells combine during the fertilization process and produce a unique individual. ...
... Sperm: Male Egg: Female These cells combine during the fertilization process and produce a unique individual. ...
Levels of Organization notes
... O: We will recognize the levels of organization in plants and animals. Plants and animals are both made of smaller parts working together to form a whole. cell - the smallest unit of structure and function of living things Unicellular organisms are made up of just one cell that performs all of its l ...
... O: We will recognize the levels of organization in plants and animals. Plants and animals are both made of smaller parts working together to form a whole. cell - the smallest unit of structure and function of living things Unicellular organisms are made up of just one cell that performs all of its l ...
Sexual and Asexual Reproduction - UNC
... Relatively few species reproduce asexually, or in a way that does not involve male and female partners. In contrast to sexual reproducers, every organism that reproduces asexually passes on its entire set of genes to the next generation. These species have a few distinct advantages over those that m ...
... Relatively few species reproduce asexually, or in a way that does not involve male and female partners. In contrast to sexual reproducers, every organism that reproduces asexually passes on its entire set of genes to the next generation. These species have a few distinct advantages over those that m ...
f215 control of protein syntheses and apoptosis student version
... worms) to vertebrates have homeobox genes. • Each homeobox gene contains 180 base pairs, which are known as the homeobox. • These produce polypeptides about 60 amino acids long. • Some of these polypeptides will initiate transcription, and so regulate the expression of other genes. ...
... worms) to vertebrates have homeobox genes. • Each homeobox gene contains 180 base pairs, which are known as the homeobox. • These produce polypeptides about 60 amino acids long. • Some of these polypeptides will initiate transcription, and so regulate the expression of other genes. ...
Topic Checklist
... Carriers have one copy of a recessive allele and can pass it on to their children. Symptoms and inheritance of cystic fibrosis, a genetic disorder caused by a single, recessive allele. Symptoms and inheritance of Huntington’s disorder, a genetic disorder caused by a single, dominant allele. Adults, ...
... Carriers have one copy of a recessive allele and can pass it on to their children. Symptoms and inheritance of cystic fibrosis, a genetic disorder caused by a single, recessive allele. Symptoms and inheritance of Huntington’s disorder, a genetic disorder caused by a single, dominant allele. Adults, ...
Transgenics--Kayla and Sarah
... spider genes into the cells of lactating goats. The goats began to manufacture silk along with their milk and secrete tiny silk strands from their body by the bucketful. By extracting polymer strands from the milk and weaving them into thread, the scientists can create a light, tough, flexible mater ...
... spider genes into the cells of lactating goats. The goats began to manufacture silk along with their milk and secrete tiny silk strands from their body by the bucketful. By extracting polymer strands from the milk and weaving them into thread, the scientists can create a light, tough, flexible mater ...
1. What is epigenesis?
... the appearance of organisms with new structures that ancestors did not have – like amphibians with feet evolving from fish that lack feet, and birds with wings evolving from reptiles without wings. Embryologically, we see similar patterns, where complex structures are produced from simpler stages th ...
... the appearance of organisms with new structures that ancestors did not have – like amphibians with feet evolving from fish that lack feet, and birds with wings evolving from reptiles without wings. Embryologically, we see similar patterns, where complex structures are produced from simpler stages th ...
Mutations 2
... The body plan of the drosophila fly is controlled by the homebox genes. These contain transcription factors that regulate other genes so that the body plan develops normally. Transcription factors act like on/off switches for gene expression. Some of these genes are maternal-effect genes. They will ...
... The body plan of the drosophila fly is controlled by the homebox genes. These contain transcription factors that regulate other genes so that the body plan develops normally. Transcription factors act like on/off switches for gene expression. Some of these genes are maternal-effect genes. They will ...
Linkage Groups - Greater Latrobe School District
... • He knew if genes were on different chromosomes phenotype would be 9:3:3:1 • Found F2 results were 3:1 (3 gray long) (1 black short) – Hypothesis: body color and wing length were linked ...
... • He knew if genes were on different chromosomes phenotype would be 9:3:3:1 • Found F2 results were 3:1 (3 gray long) (1 black short) – Hypothesis: body color and wing length were linked ...
Developmental Systems Theory
... – “DNA is the medium, not the message. A gene is not a DNA molecule; it is the transcribable information coded by the molecule. . . . The gene is a packet of information, not an object” (Williams, 1992, p. 11) • Compare: blueprint and the building – Blueprint doesn’t specify the actual materials, bu ...
... – “DNA is the medium, not the message. A gene is not a DNA molecule; it is the transcribable information coded by the molecule. . . . The gene is a packet of information, not an object” (Williams, 1992, p. 11) • Compare: blueprint and the building – Blueprint doesn’t specify the actual materials, bu ...
Development of the embryo - Hyndland Secondary School
... of their female offspring exposed to DES in utero are characterized by anatomic abnormalities. Here we show that DES administered to mice in utero produces changes in the expression pattern of several Hox genes that are involved in patterning of the reproductive tract. DES produces posterior shifts ...
... of their female offspring exposed to DES in utero are characterized by anatomic abnormalities. Here we show that DES administered to mice in utero produces changes in the expression pattern of several Hox genes that are involved in patterning of the reproductive tract. DES produces posterior shifts ...
Concept Check Questions with answers
... case in plants. In plants, growth and morphogenesis continue throughout the life of the plant. This is true only of a few types of animal cells. ...
... case in plants. In plants, growth and morphogenesis continue throughout the life of the plant. This is true only of a few types of animal cells. ...
chapter16
... Development is the process by which the descendants of a single cell specialize and organize into a complex organism. An organism contains many cells that are specialized both in structure and function. During development, cells become gradually committed to specific patterns of gene activity throug ...
... Development is the process by which the descendants of a single cell specialize and organize into a complex organism. An organism contains many cells that are specialized both in structure and function. During development, cells become gradually committed to specific patterns of gene activity throug ...
Chapter 9
... The following terms are freely used in your text book. Make sure you know what they mean, how they are used, and how to use them. When an example is given, make sure you can describe and recall it. If a picture is provided, know what the structure looks like and where it is located. If a diagram des ...
... The following terms are freely used in your text book. Make sure you know what they mean, how they are used, and how to use them. When an example is given, make sure you can describe and recall it. If a picture is provided, know what the structure looks like and where it is located. If a diagram des ...
Chromosome DNA Genes Genetic information
... Getting a few cells from a desirable plant to make a big mass of identical cells, each of which can be grown on to produce a tiny identical plant. ...
... Getting a few cells from a desirable plant to make a big mass of identical cells, each of which can be grown on to produce a tiny identical plant. ...
Bacterial conjugation Is a primitive form of sexual reproduction
... Is a primitive form of sexual reproduction, since two parent cells are involved. The benefit is that new combinations of inherited characteristics may result. This process is not actually reproduction, because there is no increase in the number of cells, however it does result in genetic recombinati ...
... Is a primitive form of sexual reproduction, since two parent cells are involved. The benefit is that new combinations of inherited characteristics may result. This process is not actually reproduction, because there is no increase in the number of cells, however it does result in genetic recombinati ...
Study of the evolution of animal parasite bacteria and plant symbionts
... plants symbionts that enter plant roots and live inside it in a cooperative manner, each partner drawing benefit from such an association. We know for sure that they descend from a common ancestor, but this ancestor is now extinct. It is of great interest to study how these bacteria evolved so diffe ...
... plants symbionts that enter plant roots and live inside it in a cooperative manner, each partner drawing benefit from such an association. We know for sure that they descend from a common ancestor, but this ancestor is now extinct. It is of great interest to study how these bacteria evolved so diffe ...
01 - Homework Now
... 1. A molecular system that controls the expression of a specific gene is called a genetic ______________________. 2. A group of related genes that lie close together and that work together as a unit is called a(n) ______________________. 3. To break down lactose, Escherichia coli need three differen ...
... 1. A molecular system that controls the expression of a specific gene is called a genetic ______________________. 2. A group of related genes that lie close together and that work together as a unit is called a(n) ______________________. 3. To break down lactose, Escherichia coli need three differen ...
01 - HomeworkNOW.com
... 7. In cell differentiation, cells become [transposed / specialized]. 8. Regulatory genes that control development include [homeotic genes / telomeres]. In the space provided, explain how the terms in each pair differ in meaning. ...
... 7. In cell differentiation, cells become [transposed / specialized]. 8. Regulatory genes that control development include [homeotic genes / telomeres]. In the space provided, explain how the terms in each pair differ in meaning. ...
ABC model of flower development
Flower development is the process by which angiosperms produce a pattern of gene expression in meristems that leads to the appearance of an organ oriented towards sexual reproduction, a flower. There are three physiological developments that must occur in order for this to take place: firstly, the plant must pass from sexual immaturity into a sexually mature state (i.e. a transition towards flowering); secondly, the transformation of the apical meristem’s function from a vegetative meristem into a floral meristem or inflorescence; and finally the growth of the flower’s individual organs. The latter phase has been modelled using the ABC model, which endeavours to describe the biological basis of the process from the perspective of molecular and developmental genetics.An external stimulus is required in order to trigger the differentiation of the meristem into a flower. This stimulus will activate mitotic cell division in the meristem, particularly on its sides where new primordia are formed. This same stimulus will also cause the meristem to follow a developmental pattern that will lead to the growth of floral meristems as opposed to vegetative meristems. The main difference between these two types of meristem, apart from the obvious disparity between the objective organ, is the verticillate (or whorled) phyllotaxis, that is, the absence of stem elongation among the successive whorls or verticils of the primordium. These verticils follow an acropetal development, giving rise to sepals, petals, stamens and carpels. Another difference from vegetative axillary meristems is that the floral meristem is «determined», which means that, once differentiated, its cells will no longer divide.The identity of the organs present in the four floral verticils is a consequence of the interaction of at least three types of gene products, each with distinct functions. According to the ABC model, functions A and C are required in order to determine the identity of the verticils of the perianth and the reproductive verticils, respectively. These functions are exclusive and the absence of one of them means that the other will determine the identity of all the floral verticils. The B function allows the differentiation of petals from sepals in the secondary verticil, as well as the differentiation of the stamen from the carpel on the tertiary verticil.Goethe’s «foliar theory» was formulated in the 18th century and it suggests that the constituent parts of a flower are structurally modified leaves, which are functionally specialized for reproduction or protection. The theory was first published in 1790 in the essay ""Metamorphosis of Plants"" (""Versuch die Metamorphose der Pflanzen zu erklaren""). where Goethe wrote:""...we may equally well say that a stamen is a contracted petal, as that a petal is a stamen in a state of expansion; or that a sepal is a contracted stem leaf approaching a certain stage of refinement, as that a stem leaf is a sepal expanded by the influx of cruder saps"".