An abnormal fruit fly has two sets of autosomes and is XXY. Such a fly would...
An abnormal fruit fly has two sets of autosomes and is XXY. Such a fly would be
| A. |
male |
|
| B. |
female |
|
| C. |
a hermaphrodite |
|
| D. |
none of the above |
Homework Answers
A frutifly with two sets of autosomes and XXY will be a normal female. In Drosophila, the Y chromosome is not necessary to confer male sex but is required for sperm development genes. The sex is instead determined by the ratio of X chromosomes to that of autosomes. Here, two X: two autosomes, ratio=1, therefore female. When ratio is 0.5, it will be a male (example- XY and two autosomes).When ration is greater than one, it is metafemale. When ratio is less than 0.5, it is metamale.
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An abnormal fruit fly has two sets of autosomes and is XXY. Such
a fly would...
A fruit fly is found that has three sex chromosomes (XXY) and three of each autosome....
A fruit fly is found that has three sex chromosomes (XXY) and three of each autosome. The sex of this fruit fly is _ because ___. A. female; it has a 1:1 ratio of sex chromosomes to autosomes B. male; it has a Y chromosome C. female; it has 2 X chromosomes D. intersex; it has an X:A ratio between 0.5 and 1 E. impossible to determine; sex is influenced by environment in insects
A white eyes female fruit fly is mated to a red eyed (wild type) male. While...
A white eyes female fruit fly is mated to a red eyed (wild type) male. While most of their progeny are as expected, occasionally a white eyed female is produced due to nondisjunction in the female. What is the likely karyotype of this white eyed daughter? (assume all fruit flies have AA as autosomes)!! (Please explain :) ) A) XX B) XXY C) XO D) XXX Y) XYY
number 8 D. ? 8. A female fruit fly is heterozygous for two genes, A and...
number 8
D. ? 8. A female fruit fly is heterozygous for two genes, A and B. Gene A is X-linked, Whereas gene B is not. If this female is mated to a male that is recessive for both genes, predict the frequency of progeny genotypes. Show your work. A. Identify parental genotypes B. Identify the gametes C. Perform the cross D. Calculate the frequencies:
It is about fruit fly monohubrid cross Fruit Fly Lab Worksheet Part A: using the site...
It
is about fruit fly monohubrid cross
Fruit Fly Lab Worksheet Part A: using the site mate your two parental flies to obtain the Fı generation and answer questions 1 through 9. Questions: 1. What is the phenotype of the female generation fly? 2. What is the genotype of the female P generation fly? 3. What is the phenotype of the male P generation fly? 4. What is the genotype of the male P generation fly? Draw a Punnett square...
A cross was made between a male fruit fly with purple eyes and two different female...
A cross was made between a male fruit fly with purple eyes and two different female flies with red eyes. The first female produced 41 progeny that all had red eyes, whereas the second female produced 18 progeny with red eyes and 21 progeny with purple eyes. a. Diagram the two crosses in words (you don't need to show the genotypes yet). b. Which eye color is dominant and which is recessive? How do you know? c. Choose a symbol...
4.3-4. The gene for eye color in a certain male fruit fly has alleles (R, W)....
4.3-4. The gene for eye color in a certain male fruit fly has alleles (R, W). The gene for eye color in the mating female fruit fly also has alleles (R, W). Their offspring receive one allele for eye color from each parent. If an offspring ends up with either (R, R), (R, W), or (W, R), its eyes will look red. Let X equal the number of offspring having red eyes. Let Y equal the number of red-eyed offspring...
3) For a study of free-living populations of the fruit-fly, researchers placed baited traps in two...
3) For a study of free-living populations of the fruit-fly, researchers placed baited traps in two woodland sites and one open-ground area. The numbers of male and female flies trapped in a single day are given in the table. Woodland1 Woodland2 Open Total 160 175 335 70 130 200 Males Females 30 15 45 60 30 90 Total Use a chi-square test to test if males and females ratio is similar among the three sites Let α = 0.05. List...
Drosophila melanogaster, the fruit fly, has a 2n chromosome number of 8 (4 chromosomes – 3...
Drosophila melanogaster, the fruit fly, has a 2n chromosome number of 8 (4 chromosomes – 3 autosomes and 1 sex chromosome). Assume that you are microscopically examining the mitotic and meiotic cells of this organism. You note that in the female, two chromosomal pairs are metacentric and two pairs are acrocentric. Draw the chromosomal configurations as you would expect to see them at the stages listed: i. mitotic metaphase ii. primary oocyte (meiotic metaphase I) iii. secondary oocyte (meiotic metaphase...
2. You cross a homozygous wildtype female Drosophila (fruit fly) with a male that has a black body (bb). You mate two of the F1 (first generation) flies and examine the F2 (second generation) off...
2. You cross a homozygous wildtype female Drosophila (fruit fly) with a male that has a black body (bb). You mate two of the F1 (first generation) flies and examine the F2 (second generation) offspring. The phenotypes can be seen in the table below. a. Draw a pedigree to show the P, F1, and F2 generations. You only need to draw one fly with each phenotype for the F2 generation. seen in this cross. the expected values for a cross...
genetics Analyze the following fruit fly cross. In this cross there are two autosomal traits that...
genetics
Analyze the following fruit fly cross. In this cross there are two autosomal traits that are influenced by two distinct genes and the F2 generation came from crossing an F1 male with an F1 female. P: true breeding grey eyed; brown bodied males x true breeding red eyed; black bodied females F1: all offspring are red eyed; brown bodied F2: ? When the F1 flies are allowed to self cross, what percentage of F2 flies will have both brown...
number 8
D. ? 8. A female fruit fly is heterozygous for two genes, A and B. Gene A is X-linked, Whereas gene B is not. If this female is mated to a male that is recessive for both genes, predict the frequency of progeny genotypes. Show your work. A. Identify parental genotypes B. Identify the gametes C. Perform the cross D. Calculate the frequencies:
It
is about fruit fly monohubrid cross
Fruit Fly Lab Worksheet Part A: using the site mate your two parental flies to obtain the Fı generation and answer questions 1 through 9. Questions: 1. What is the phenotype of the female generation fly? 2. What is the genotype of the female P generation fly? 3. What is the phenotype of the male P generation fly? 4. What is the genotype of the male P generation fly? Draw a Punnett square...
A cross was made between a male fruit fly with purple eyes and two different female flies with red eyes. The first female produced 41 progeny that all had red eyes, whereas the second female produced 18 progeny with red eyes and 21 progeny with purple eyes. a. Diagram the two crosses in words (you don't need to show the genotypes yet). b. Which eye color is dominant and which is recessive? How do you know? c. Choose a symbol...
3) For a study of free-living populations of the fruit-fly, researchers placed baited traps in two woodland sites and one open-ground area. The numbers of male and female flies trapped in a single day are given in the table. Woodland1 Woodland2 Open Total 160 175 335 70 130 200 Males Females 30 15 45 60 30 90 Total Use a chi-square test to test if males and females ratio is similar among the three sites Let α = 0.05. List...
2. You cross a homozygous wildtype female Drosophila (fruit fly) with a male that has a black body (bb). You mate two of the F1 (first generation) flies and examine the F2 (second generation) offspring. The phenotypes can be seen in the table below. a. Draw a pedigree to show the P, F1, and F2 generations. You only need to draw one fly with each phenotype for the F2 generation. seen in this cross. the expected values for a cross...
genetics
Analyze the following fruit fly cross. In this cross there are two autosomal traits that are influenced by two distinct genes and the F2 generation came from crossing an F1 male with an F1 female. P: true breeding grey eyed; brown bodied males x true breeding red eyed; black bodied females F1: all offspring are red eyed; brown bodied F2: ? When the F1 flies are allowed to self cross, what percentage of F2 flies will have both brown...
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