Homework Answers
Linkage between alleles is said to exist when the recombinant frequency between the two alleles is less than 50% This is because if the distance is more than 50%, it means the two alleles exist on different chromosomes. This is due to the fact that only two of the chromosomes of the homologous pair participate in synapsis. Therefore, at least 50% of the offspring should have the same allele arrangement as the heterozygous parents.
Option (b) is correct.
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In a test cross to determine gene linkage, at least 50% of the offspring should have...
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...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus. there is a dominant gene for red eyes and its recessive allele for purple eyes. A female that was heterozygous at both gene loci was mated with a male that is homozygous for both recessive alleles. Knowing this, complete the sentences with the correct terms. 94% crossing over independent assortment...
4. In the diploid roundworm Arronax, the Dpy gene, which is on the extreme right end...
4. In the diploid roundworm Arronax, the Dpy gene, which is on the extreme right end of chromosome I, has two alleles: a dominant wild type allele (D) and a recessive dumpy (short and fat) allele (d). On the extreme left end of chromosome I is the twister gene with a dominant wild type allele (T) and a recessive twisted(corkscrew body) allele (t). Arronax has the curious property that each pair of homologous chromosomes undergoes exactly one recombination event per...
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...
Circle the correct answer, there may be more than one correct answer 1. Diploid Organisms: a)...
Circle the correct answer, there may be more than one correct answer 1. Diploid Organisms: a) typically have 23 pairs of chromosomes b) are heterozygous for a trait when they carry different alleles c) carry 2 copies of chromosomes d) are homozygous for a trait when they carry different alleles 2. Why are garden peas a good subject for Mendel's experiments? a) garden peas had either or traits b) garden pess could self-pollinate to produce offspring of the same variety...
1. A) Explain what is sex linkage, and B) Apply the concept of sex linkage to...
1. A) Explain what is sex linkage, and B) Apply the concept of sex linkage to explain why color blindness is more prevalent in men than in women. A boy who is colorblind, which parent did he inherit this gene from? Explain. 2. In plants long pollen gain is dominant to short grain and purple flower color is dominant to white color. You are mating two plants. One is homozygous recessive for both traits, flower color and pollen grain. The...
2. You have a fly strain heterozygous for a reciprocal translocation between an acrocentric chromosome (solid)...
2. You have a fly strain heterozygous for a reciprocal translocation between an acrocentric chromosome (solid) and a metacentric chromosome (wavy). The normal homologues have dominant alleles for the genes shown, while the re-arranged chromosomes have recessive alleles. A B F G NOR a bf an anong A. (3pts) What kind of gametes can a male of this strain produce? (note that there is no recombination in Drosophila males) B. (3pts) If you performed a test cross of a male...
Pre-lecture lesson 2.12: Linkage and Gene Mapping You are charged with testing whether 2 different genes...
Pre-lecture lesson 2.12: Linkage and Gene Mapping You are charged with testing whether 2 different genes are independently assorting during meiosis in Drosophila melanogaster, the fruit fly The 2 genes you will be observing for this experiment are: Black: a recessive allele of this gene (b) results in a dark body color (somewhat similar to ebony, but a richer dark coloration that is less ashen-colored). The dominant allele for this gone (B) produces wild type body color Vestigial: a recessive...
Question 1 (10 pts). Ilne genetic linkage among 3 gene loci in norses is being stuaiea....
Question 1 (10 pts). Ilne genetic linkage among 3 gene loci in norses is being stuaiea. ine loci are part of autosomal chromosomes and they MIGHT be on the same pair of homologous chromosomes. There are two alleles at each locus. At the coat color locus, allele B is for black, and b is for white. At the height locus, allele H is for tall, and h is for short. At the tail locus, allele T is for long, and...
1. A genetic cross in which the inheritance of two traits is observed is called a...
1. A genetic cross in which the inheritance of two traits is observed is called a A) Dihybrid cross. B) Monohybrid cross C) Backeross D) Testcross 2. For single crossovers, the frequency of recombinant gametes is half the frequency of crossing over because A) A testeross between a homozygous and heterozygote produces 1/2 heterozygous and 1/2 homozygous progeny. B) The frequency of recombination is always 50%. C) Each crossover takes place between only two of the four chromatids of a...
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...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus. there is a dominant gene for red eyes and its recessive allele for purple eyes. A female that was heterozygous at both gene loci was mated with a male that is homozygous for both recessive alleles. Knowing this, complete the sentences with the correct terms. 94% crossing over independent assortment...
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...
Circle the correct answer, there may be more than one correct answer 1. Diploid Organisms: a) typically have 23 pairs of chromosomes b) are heterozygous for a trait when they carry different alleles c) carry 2 copies of chromosomes d) are homozygous for a trait when they carry different alleles 2. Why are garden peas a good subject for Mendel's experiments? a) garden peas had either or traits b) garden pess could self-pollinate to produce offspring of the same variety...
2. You have a fly strain heterozygous for a reciprocal translocation between an acrocentric chromosome (solid) and a metacentric chromosome (wavy). The normal homologues have dominant alleles for the genes shown, while the re-arranged chromosomes have recessive alleles. A B F G NOR a bf an anong A. (3pts) What kind of gametes can a male of this strain produce? (note that there is no recombination in Drosophila males) B. (3pts) If you performed a test cross of a male...
Pre-lecture lesson 2.12: Linkage and Gene Mapping You are charged with testing whether 2 different genes are independently assorting during meiosis in Drosophila melanogaster, the fruit fly The 2 genes you will be observing for this experiment are: Black: a recessive allele of this gene (b) results in a dark body color (somewhat similar to ebony, but a richer dark coloration that is less ashen-colored). The dominant allele for this gone (B) produces wild type body color Vestigial: a recessive...
Question 1 (10 pts). Ilne genetic linkage among 3 gene loci in norses is being stuaiea. ine loci are part of autosomal chromosomes and they MIGHT be on the same pair of homologous chromosomes. There are two alleles at each locus. At the coat color locus, allele B is for black, and b is for white. At the height locus, allele H is for tall, and h is for short. At the tail locus, allele T is for long, and...
1. A genetic cross in which the inheritance of two traits is observed is called a A) Dihybrid cross. B) Monohybrid cross C) Backeross D) Testcross 2. For single crossovers, the frequency of recombinant gametes is half the frequency of crossing over because A) A testeross between a homozygous and heterozygote produces 1/2 heterozygous and 1/2 homozygous progeny. B) The frequency of recombination is always 50%. C) Each crossover takes place between only two of the four chromatids of a...
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