Homework Answers
Crossing over is shown in Figure.
2.There is a occurance of two important events.Firstly is separation of the alles of two pairs of traits independent of each other(Law of segregation )during gamet or spore formation.Secondly rearrangement of alleles in he offspring at the time of fertilization randomly.
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Consider the chromosomes for a germ cell from a male dihybrid with the unlinked autosomal genes...
1. (2 pts) Homologous chromosomes a. come from different parents b. have the same genes c....
1. (2 pts) Homologous chromosomes a. come from different parents b. have the same genes c. may have different alleles d. have very similar DNA sequences e. all of the above f. none of the above 2. (3 pts) List the three ways that sexual reproduction increases the genetic variability of a population more than does asexual reproduction. 3. (2 pts) An organism has six independent (unlinked) genes and the following genotype: aaBbDdEEffag. How many different gametes could this organism...
1) Consider a single germ cell with the genotype A/a;B/b undergoing meiosis. Which of the following...
1) Consider a single germ cell with the genotype A/a;B/b undergoing meiosis. Which of the following are possible genotypes for the set of four gametes resulting from meiosis of this single germ cell? (assume that there is NOT any nondisjunction) A, a, B, b Aa, Aa, Bb, Bb AB, Ab, aB, ab Ab, Ab, aB, aB aa, AA, BB, bb 2) From true-breeding stocks, a female fly with no eyes (mutation in eyeless (ey) gene) and no wings (mutation in...
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...
2. A diploid cell contains two pairs of chromosomes, which we will call 1 and 2....
2. A diploid cell contains two pairs of chromosomes, which we will call 1 and 2. Assume chromosome! is clearly larger than chromosome 2. Each chromosome pair contains a maternal and a paternal member (e.g. 1 and 1 & 2 and 2"). An allele called G is localized to 1" whereas an allele called g is on chromosome 1P. Allele R is localized to 2m whereas alleler is localized to 2. Using these designations and clearly drawn and labeled chromosomes,...
Amounts of which of the components of cell cycle regulation vary with cell cycle phase? Cyclin-dependent...
Amounts of which of the components of cell cycle regulation vary with cell cycle phase? Cyclin-dependent kinases Cyclins Checkpoints Kinetochores The synaptonemal complex forms to facilitate pairing of homologous chromosomes during prophase of mitosis and meiosis. prophase of meiosis I and II. c. prophase of meiosis I only. d. all stages of meiosis. Mendel’s Second Law of Independent Assortment refers to the separation of two identical alleles of the same gene. two different alleles of the same gene. alleles...
3) Dihybrid cross: The dark-bodied and rudimentary winged genes are on two different autosomal chromosomes. We...
3) Dihybrid cross: The dark-bodied and rudimentary winged genes are on two different autosomal chromosomes. We will use this cross to determine the ratios of phenotypes in the F2 generation when there are two genes involved. 3.1) Use the following symbols to write out the cross: Male: Female: 0 Dark body color (ebony) = Wild-type body color: E or E+ Rudimentary wings- (vestigial wings= v) Wild-type wings: V or V+ 3.2) What would the cross look like if we mated...
Which of these statements is incorrect? Syntenic genes are located on the same chromosome. Independent assortment...
Which of these statements is incorrect? Syntenic genes are located on the same chromosome. Independent assortment results in recombinant chromosomes. You can reliably predict the relative genetic distance from genes’ physical distance on a chromosome. Linked genes are always syntenic. What is the relative genetic distance between two linked genes if the recombination frequency is 0.49? 0.49 cM 4.9 cM 49 cM 490 cM What statement best explains the distortion in Mendelian ratios observed by Bateson & Punnett in 1905?...
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...
D Question 72 1 pts If a diploid cell with 40 chromosomes undergoes meiosis, each daughter...
D Question 72 1 pts If a diploid cell with 40 chromosomes undergoes meiosis, each daughter nuclei will have _ chromosomes. 60 . O 10 Human diploid cells have chromosomes while human gametes have chromosomes.. 46; 92 48; 96 96; 48 O 46; 23 23; 46 Crossing-over only takes place between sister chromatids O can only occur once for each homologous chromosome pair O only takes place towards the middle of chromatids O can only occur once for each non-sister...
Which of the following is not one of the ways that meiosis can introduce variability into...
Which of the following is not one of the ways that meiosis can introduce variability into a population via sexual reproduction? meiosis never introduces genetic variation production of diploid gametes independent assortment along the metaphase plate crossing over random fertilization The role of meiosis in Mendel's law of segregation is that it allows crossing over to occur. it allows genes to be duplicated. it separates sister chromatids and exact copies of genes it separates homologous chromosomes and therefore gene alleles...
1. (2 pts) Homologous chromosomes a. come from different parents b. have the same genes c. may have different alleles d. have very similar DNA sequences e. all of the above f. none of the above 2. (3 pts) List the three ways that sexual reproduction increases the genetic variability of a population more than does asexual reproduction. 3. (2 pts) An organism has six independent (unlinked) genes and the following genotype: aaBbDdEEffag. How many different gametes could this organism...
2. A diploid cell contains two pairs of chromosomes, which we will call 1 and 2. Assume chromosome! is clearly larger than chromosome 2. Each chromosome pair contains a maternal and a paternal member (e.g. 1 and 1 & 2 and 2"). An allele called G is localized to 1" whereas an allele called g is on chromosome 1P. Allele R is localized to 2m whereas alleler is localized to 2. Using these designations and clearly drawn and labeled chromosomes,...
3) Dihybrid cross: The dark-bodied and rudimentary winged genes are on two different autosomal chromosomes. We will use this cross to determine the ratios of phenotypes in the F2 generation when there are two genes involved. 3.1) Use the following symbols to write out the cross: Male: Female: 0 Dark body color (ebony) = Wild-type body color: E or E+ Rudimentary wings- (vestigial wings= v) Wild-type wings: V or V+ 3.2) What would the cross look like if we mated...
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...
D Question 72 1 pts If a diploid cell with 40 chromosomes undergoes meiosis, each daughter nuclei will have _ chromosomes. 60 . O 10 Human diploid cells have chromosomes while human gametes have chromosomes.. 46; 92 48; 96 96; 48 O 46; 23 23; 46 Crossing-over only takes place between sister chromatids O can only occur once for each homologous chromosome pair O only takes place towards the middle of chromatids O can only occur once for each non-sister...
Which of the following is not one of the ways that meiosis can introduce variability into a population via sexual reproduction? meiosis never introduces genetic variation production of diploid gametes independent assortment along the metaphase plate crossing over random fertilization The role of meiosis in Mendel's law of segregation is that it allows crossing over to occur. it allows genes to be duplicated. it separates sister chromatids and exact copies of genes it separates homologous chromosomes and therefore gene alleles...
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