Homework Answers
In the question it is given that individuals who are having iridescent wings always have glittery skin but they don't have shimmery skin. On the other hand individuals having dull Wings always have shimmery skin but they don't have glittery skin.
It means the combination of Iridescent wing and shimmery skin and the combination of dull wings and glittery skin is not possible. It means recombination is not taking place between these two genes. This is because these two genes are very very tightly placed with one another on the same chromosome. That is the reason they are always inherited together and can not show any sort of recombination.
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6. In fairies, individuals can have dull or iridescent wings and shimmery or glittery skin. Individuals...
need help with 6-7 6. In fairies, individuals can have dull or iridescent wings and shimmery...
need help with 6-7
6. In fairies, individuals can have dull or iridescent wings and shimmery or glittery skin. Individuals who have iridescent wings almost always also have glittery skin while individuals who have dull wings almost always have shimmery skin. Is crossing over and recombination likely to occur between these two genes? Why or why not? 7. The maximum rate for crossing over between two genes is 50%. Why?
You see a recombination frequency of 50% between two genes. Which of the following possibilities can...
You see a recombination frequency of 50% between two genes. Which of the following possibilities can you exclude? That the genes are located close together on the same chromosome That the genes are on different chromosomes O That the genes are assorting independently That the genes are located on the same chromosome, but very far apart Meiosis contributes to genetic diversity by: o Reducing the number of chromosomes for karyogamy (fusion of nuclei) with another gamete O Recombining homologous chromosomes...
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...
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...
13. Creighton and McClintock worked with homologous chromosomes physically exchange genetic information during cros...
13. Creighton and McClintock worked with homologous chromosomes physically exchange genetic information during crossing over and their model system to show that A) Peas B. Corn 14. While mapping two genes in Drosophila you observe 40 recombinants among 200 total A) 30 map units 15. Another name for a chromosome is C. Fruit flies D. Tobacco offspring. What is the distance between these genes? B. 20 map units C200 map units D. 6.67 map units , since it contains genes...
Please do all Evolution, Diversity& Phylogeny Practice Problems Will an extremely rare, beneficial allele have a...
Please do all
Evolution, Diversity& Phylogeny Practice Problems Will an extremely rare, beneficial allele have a better chance of fixing in a very large population, or in a very small population? Explain your answer. What are the four forces of evolution? Which evolutionary forces increase genetic diversity? Which decrease diversity? List Darwin's postulates? If these are NOT fulfilled, can evolution occur? 1. 2. 3. 4. The A and B genes are closely linked on an autosome). Gene D resides on...
Drosophila genetics hw. Can someone help explain this You are doing a genetics experiment with the...
Drosophila genetics hw. Can someone help explain this
You are doing a genetics experiment with the fruit fly. In the "P" generation, you cross two true-breeding flies. The female parent is brown and wingless and the male parent is black with normal wings. All of the flies in the F1 generation are brown and have normal wings. Indicate the alleles associated with dominant phenotypes by uppercase letters and alleles associated with recessive phenotypes by lowercase letters. Assume the genes are...
all these questions have more than one correct answers 1) Meiosis & mitosis have similarities as...
all these questions have more than one correct answers 1) Meiosis & mitosis have similarities as well as differences. Which of the following represent similarities? a) Both increases genetic variation b) Both change in chromosomes number in daughter cells c) Both only occur in eukaryotes D) DNA replication must occur prior to both e) Both make use of a spindle to separate chromatids 2) Meiosis is a special form of cell division. Select any of the following that applies to...
Simulate meiosis by drawing Two pairs of chromosomes with crossing over Assume that two of the...
Simulate meiosis by drawing Two pairs of chromosomes with crossing over Assume that two of the genes are on chromosome 1, and one of the genes is on chromosome 2. Allow crossing over to occur between the two genes on the same chromosome. Also, are there multiple ways that the chromosomes could segregate to produce different results? Show them. Instructions: Set up your cell. The cell you start with should be: A diploid cell It should contain 2 pairs of...
LABORATORY 10: INHERITANCE END-OF-EXERCISE REVIEW MATCHING: Choose the modes of inheritance listed at the right that...
LABORATORY 10: INHERITANCE END-OF-EXERCISE REVIEW MATCHING: Choose the modes of inheritance listed at the right that correspond to the statements at the left. Each inheritance type will be used twice. 1. When two or more genes determine a single trait. A Incomplete dominance 2. When a trait is determined by genes located on 3. When one gene controls the expression of a B. Sex-linkage C. Polygenic inheritance D. Pleiotropy E. Epistasis F. Linked genes one of the sex chromosomes. second...
need help with 6-7
6. In fairies, individuals can have dull or iridescent wings and shimmery or glittery skin. Individuals who have iridescent wings almost always also have glittery skin while individuals who have dull wings almost always have shimmery skin. Is crossing over and recombination likely to occur between these two genes? Why or why not? 7. The maximum rate for crossing over between two genes is 50%. Why?
You see a recombination frequency of 50% between two genes. Which of the following possibilities can you exclude? That the genes are located close together on the same chromosome That the genes are on different chromosomes O That the genes are assorting independently That the genes are located on the same chromosome, but very far apart Meiosis contributes to genetic diversity by: o Reducing the number of chromosomes for karyogamy (fusion of nuclei) with another gamete O Recombining homologous chromosomes...
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...
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...
13. Creighton and McClintock worked with homologous chromosomes physically exchange genetic information during crossing over and their model system to show that A) Peas B. Corn 14. While mapping two genes in Drosophila you observe 40 recombinants among 200 total A) 30 map units 15. Another name for a chromosome is C. Fruit flies D. Tobacco offspring. What is the distance between these genes? B. 20 map units C200 map units D. 6.67 map units , since it contains genes...
Please do all
Evolution, Diversity& Phylogeny Practice Problems Will an extremely rare, beneficial allele have a better chance of fixing in a very large population, or in a very small population? Explain your answer. What are the four forces of evolution? Which evolutionary forces increase genetic diversity? Which decrease diversity? List Darwin's postulates? If these are NOT fulfilled, can evolution occur? 1. 2. 3. 4. The A and B genes are closely linked on an autosome). Gene D resides on...
Drosophila genetics hw. Can someone help explain this
You are doing a genetics experiment with the fruit fly. In the "P" generation, you cross two true-breeding flies. The female parent is brown and wingless and the male parent is black with normal wings. All of the flies in the F1 generation are brown and have normal wings. Indicate the alleles associated with dominant phenotypes by uppercase letters and alleles associated with recessive phenotypes by lowercase letters. Assume the genes are...
LABORATORY 10: INHERITANCE END-OF-EXERCISE REVIEW MATCHING: Choose the modes of inheritance listed at the right that correspond to the statements at the left. Each inheritance type will be used twice. 1. When two or more genes determine a single trait. A Incomplete dominance 2. When a trait is determined by genes located on 3. When one gene controls the expression of a B. Sex-linkage C. Polygenic inheritance D. Pleiotropy E. Epistasis F. Linked genes one of the sex chromosomes. second...
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