Gene conversion sometimes occurs during crossing over, but only one of the alleles is exchanged: the...
Gene conversion sometimes occurs during crossing over, but only one of the alleles is exchanged: the other allele is lost. Can you give a simple argument to prove that segregation patterns such as these cannot result from any combination of crossing over and segregation?
Homework Answers
Despite being on the same chromosome, the round and green alleles could become separated during meiosis by crossing over, a form of genetic recombination. During crossing over, homologous chromosomes exchange segments. This could allow the yellow allele to switch places with the green allele and lead to a round-yellow gamete. If the loci for the two genes are very close, crossing over is unlikely to separate alleles, whereas if they are far apart, crossing over is much more likely to separate them. Therefore, the frequency of crossing over is related to the physical distance between the loci for the two genes.
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Gene conversion sometimes occurs during crossing over, but only
one of the alleles is exchanged: the...
A gene that affects more than one phenotype the combination of two alleles which comprise the gen...
match the mendelian genetics definition with the best
term
a gene that affects more than one phenotype the combination of two alleles which comprise the gene pair the allele that expresses itself at the expense of an alternate allele the form that is shown": it is the outward, physical appearance of a particular trait one alternative form of a given allelic pair the offspring of two parents that are homozygous for alternate alleles of a gene pair an individual heterozygous...
Of the following evolutionary forces; crossing over, directional selection, mutation, speciation, stabilizing selection, sex, gene flow...
Of the following evolutionary forces; crossing over, directional selection, mutation, speciation, stabilizing selection, sex, gene flow and genetic drift which promote or maintain genetic variation within a population? a) crossing over only b) directional selection and sex c) directional selection, mutation, and speciation d) crossing over, mutation, sex, and gene flow e) only sex Of the following evolutionary forces, crossing over, directional selection, mutation, speciation, stabilizing selection, sex, gene flow and genetic drift which promote genetic differentiation (divergence) among populations?...
can someone please help me with this ? Practice Using a Punnett Square. Punnett Squares are...
can someone please help me with this ?
Practice Using a Punnett Square. Punnett Squares are tools to identify outcomes known genotypes. They can be used to help infer probabilities of genotypes and from a particular cross. of possible crosses between individuals of phenotypes amongst offspring lele forms "A" and "a". A woman is heterozygous, so she can produce eggs with Consider a gene with all 9. and Write them across the top of the Punnett Square below the following...
6.) During meiosis, when crossing-over occurs between two homologous chromosomes, it does not happen at a...
6.) During meiosis, when crossing-over occurs between two homologous chromosomes, it does not happen at a single point, but rather two points with a stretch of DNA in between. a. What are the two junction points called? b. What is the region between the two points called and what is different about this region compared to how double-stranded DNA usually is? c. If the region described in b.) is located within a gene and the two homologues have different alleles...
Unequal crossing over during prophase I can result in one sister chromosome with a deletion and...
Unequal crossing over during prophase I can result in one sister chromosome with a deletion and another with a duplication. A mutated form of hemoglobin, so-called hemoglobin Lepore, exists in the human population. Hemoglobin Lepore has a deleted series of amino acids. If this mutated form was caused by unequal crossing over, and removed TAGGATA, what does a normal and a Lepore gene look like? Draw a diagram illustrating a normal and a diagram of a Lepore gene.
please help me with these Question 9 (Mandatory) (2 points) What is a recessive disorder? a...
please help me with these
Question 9 (Mandatory) (2 points) What is a recessive disorder? a genetic disorder that will express itself in the presence of one functioning allele a genetic disorder with two functioning alleles O a genetic disorder that involves change in chromosome structure a genetic disorder that will express itself in the presence of two recessive alleles O a genetic disorder that involves change in chromosome number Question 10 (Mandatory) (2 points) What is the basis for...
The Law of independent assortment states that A diploid organism's three alleles for a gene separate...
The Law of independent assortment states that A diploid organism's three alleles for a gene separate from one another during gamete formation Segregation of an allelic pair for one trait has no effect on segregation of alleles for another trait. none of the answers listed An organism's two alleles for a gene separate from one another during gamete formation. Segregation of an allelic pair for one trait has a great effect on segregation of alleles for another trait Nucleosomes that...
1) The alternate forms of a gene for the same trait are known as -A)alleles. B)phenotypes....
1) The alternate forms of a gene for the same trait are known as -A)alleles. B)phenotypes. C)genotypes. D)codominants. E)incomplete dominants. 2) Mendel carried out most of his research with A)livestock -B)pea plants. C)guinea pigs. D)fruit flies. E)bacteria. 3) Which of the following is true according to Mendel's law of segregation? A)Each individual contains two alleles for each trait. B)Fertilization restores the presence of two alleles. C)Alleles separate from each other during gamete formation. D)Each gamete contains one copy of each...
One-Gene Crosses 1. In Drosophila, gray body color is dominant over black body color. By crossing...
One-Gene Crosses 1. In Drosophila, gray body color is dominant over black body color. By crossing a heterozygous gray-bodied fly with a black-bodied fly, one hundred offspring resulted. How many would be expected to have black bodies? 7 2. Albinism, the lack of pigment, occurs commonly in animals and is always recessive to normal pigmentation. Ten brown and eight albino mice were born to parents which were likewise brown and albino. What are the genotypes of both parents? 3. The...
(Q19-22) The pedigree on left shows the inheritance patterns of two diseases among human populations: one...
(Q19-22) The pedigree on left shows the inheritance patterns of two diseases among human populations: one is indicated by a vertical line and the other indicated by a horizontal line. 3 19. Which is the correct description of the two diseases? A. dominant and autosomal-linked B. dominant and X-chromosomal linked C. recessive and autosomal-linked D. recessive and X-chromosomal linked E. codominant and X chromosomal linked 20. Which individual is heterozygous for both disease alleles? A. I-1 B. II-1 C. II-2...
match the mendelian genetics definition with the best
term
a gene that affects more than one phenotype the combination of two alleles which comprise the gene pair the allele that expresses itself at the expense of an alternate allele the form that is shown": it is the outward, physical appearance of a particular trait one alternative form of a given allelic pair the offspring of two parents that are homozygous for alternate alleles of a gene pair an individual heterozygous...
can someone please help me with this ?
Practice Using a Punnett Square. Punnett Squares are tools to identify outcomes known genotypes. They can be used to help infer probabilities of genotypes and from a particular cross. of possible crosses between individuals of phenotypes amongst offspring lele forms "A" and "a". A woman is heterozygous, so she can produce eggs with Consider a gene with all 9. and Write them across the top of the Punnett Square below the following...
6.) During meiosis, when crossing-over occurs between two homologous chromosomes, it does not happen at a single point, but rather two points with a stretch of DNA in between. a. What are the two junction points called? b. What is the region between the two points called and what is different about this region compared to how double-stranded DNA usually is? c. If the region described in b.) is located within a gene and the two homologues have different alleles...
please help me with these
Question 9 (Mandatory) (2 points) What is a recessive disorder? a genetic disorder that will express itself in the presence of one functioning allele a genetic disorder with two functioning alleles O a genetic disorder that involves change in chromosome structure a genetic disorder that will express itself in the presence of two recessive alleles O a genetic disorder that involves change in chromosome number Question 10 (Mandatory) (2 points) What is the basis for...
The Law of independent assortment states that A diploid organism's three alleles for a gene separate from one another during gamete formation Segregation of an allelic pair for one trait has no effect on segregation of alleles for another trait. none of the answers listed An organism's two alleles for a gene separate from one another during gamete formation. Segregation of an allelic pair for one trait has a great effect on segregation of alleles for another trait Nucleosomes that...
1) The alternate forms of a gene for the same trait are known as -A)alleles. B)phenotypes. C)genotypes. D)codominants. E)incomplete dominants. 2) Mendel carried out most of his research with A)livestock -B)pea plants. C)guinea pigs. D)fruit flies. E)bacteria. 3) Which of the following is true according to Mendel's law of segregation? A)Each individual contains two alleles for each trait. B)Fertilization restores the presence of two alleles. C)Alleles separate from each other during gamete formation. D)Each gamete contains one copy of each...
One-Gene Crosses 1. In Drosophila, gray body color is dominant over black body color. By crossing a heterozygous gray-bodied fly with a black-bodied fly, one hundred offspring resulted. How many would be expected to have black bodies? 7 2. Albinism, the lack of pigment, occurs commonly in animals and is always recessive to normal pigmentation. Ten brown and eight albino mice were born to parents which were likewise brown and albino. What are the genotypes of both parents? 3. The...
(Q19-22) The pedigree on left shows the inheritance patterns of two diseases among human populations: one is indicated by a vertical line and the other indicated by a horizontal line. 3 19. Which is the correct description of the two diseases? A. dominant and autosomal-linked B. dominant and X-chromosomal linked C. recessive and autosomal-linked D. recessive and X-chromosomal linked E. codominant and X chromosomal linked 20. Which individual is heterozygous for both disease alleles? A. I-1 B. II-1 C. II-2...
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