Genes A and B are 5 units apart. A doubly heterozygous female and a homozygous recessive...
Genes A and B are 5 units apart. A doubly heterozygous female
and a homozygous recessive male are crossed. Of ten thousand
offspring, how many recombinant offspring would be produced?
A. 2500
B. 250
C. 50
D. 500
E. 5
Homework Answers
Answer: D. 500
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Genes A and B are 5 units apart. A doubly heterozygous female
and a homozygous recessive...
You cross a heterozygous female with a homozygous recessive male for three traits - A B...
You cross a heterozygous female with a homozygous recessive male for three traits - A B C. You see the offspring ABC 233, abc 239, ABc 231, abC 241, aBc 12, AbC 14, aBC 14, Abc 16. Which of the genes - if any - are linked? How far apart are any/all linked genes? What is the order of genes on the chromosome if applicable?
In Drosophila, the genes for black (b) body and curved (c) wings are linked on the...
In Drosophila, the genes for black (b) body and curved (c) wings are linked on the same chromosome. The frequency of recombination between b---c is 0.276. How many recombinant offspring would be expected if 2000 progeny were produced from a testcross between a female heterozygous for both genes and a homozygous recessive male?
The B and N genes are 25 map units apart on a chromosome. a) Following a...
The B and N genes are 25 map units apart on a chromosome. a) Following a dihybrid testcross, how many offspring of 250 would you expect to display a recombinant phenotype? a) If you performed a dihybrid testcross, with a cis dihybrid, what would be the genotypes of both recombinant offspring phenotypic classes?
12. What is a suspected heterozygous individual crossed with in a test cross? A. Homozygous dominant...
12. What is a suspected heterozygous individual crossed with in
a test cross?
A. Homozygous dominant
B. Homozygous recessive
C. Heterozygous dominant
D. Heterozygous recessive
13. Which of the following genotypes is possible in the
offspring of a homozygous male with blood group A and a female with
blood group B?
The answers are 12B, 13B, 14C can you explain how?
Α. ΙΑΙΑ 14. What type of inheritance is shown in this pedigree chart? Key: Affected O Carrier A. X-linked...
Genes A and B are linked and 32 map units apart (A is dominant over a,...
Genes A and B are linked and 32 map units apart (A is dominant over a, and B is dominant over b). If an Ab/aB heterozygote is test-crossed and you look at 100 offspring, how many offspring recessive for both phenotypes do you expect? Answer:
Albinism in the Agouti is caused by the homozygous recessive genotype for a gene that would...
Albinism in the Agouti is caused by the homozygous recessive genotype for a gene that would otherwise serve to activate the expression of pigment forming genes. These pigment forming genes (if active) result in either brown (recessive trait) or black fur (dominant trait). If a male and female Agouti, each of whom are heterozygous for both the pigment activating gene and the pigment forming gene, then what is the likelihood that they could produce an albino offspring?
How to write the Cross for genes that are Linked together? for example a female heterozygous...
How to write the Cross for genes that are Linked together? for example a female heterozygous and male that is homozygous recessive. Based on the Chi square I found that there is no independent assortment of genes therefore they are linked. How can I determine correct genotype notation and the cross for linked gene ?
In flamingos, genes A and B are known to be 21 map units apart on chromosome...
In flamingos, genes A and B are known to be 21 map units apart on chromosome #5. You mate an AA:BB male with an aa:bb female to produce F1 flamingos. a. What gametes will be made by these F1 individuals and in what proportions? b. When the F1's are bred to each other, they produce a total of 276 offspring. How many of these offspring would you predict should have the genotype Aa:BB?
A female fly is heterozygous for three X-linked genes. The dominant alleles are ABC and the...
A female fly is heterozygous for three X-linked genes. The dominant alleles are ABC and the recessive alleles are abc. She is crossed with an abc/Y male. The following progeny phenotypes are produced. These phenotypes are equally divided between male and female flies. Abc 420 aBC 435 abc 55 ABC 60 abC 14 ABc 16 What is the distance between a and c in mu?
1) (3 pts) The following two recessive genes are known for corn: brittle endosperm (b) and...
1) (3 pts) The following two recessive genes are known for corn: brittle endosperm (b) and glossy leaf (g). Two true-breeding plants with contrasting phenotypes are crossed (both plants are homozygous for both genes). The Fi offspring are all wild type. Then, an F1 plant is test-crossed with a brittle/glossy parent, and the following offspring are obtained: 16 238 wild type glossy brittle glossy, brittle 254 25 (a) Explain your reasoning as to why these data indicate that the two...
The B and N genes are 25 map units apart on a chromosome. a) Following a dihybrid testcross, how many offspring of 250 would you expect to display a recombinant phenotype? a) If you performed a dihybrid testcross, with a cis dihybrid, what would be the genotypes of both recombinant offspring phenotypic classes?
12. What is a suspected heterozygous individual crossed with in
a test cross?
A. Homozygous dominant
B. Homozygous recessive
C. Heterozygous dominant
D. Heterozygous recessive
13. Which of the following genotypes is possible in the
offspring of a homozygous male with blood group A and a female with
blood group B?
The answers are 12B, 13B, 14C can you explain how?
Α. ΙΑΙΑ 14. What type of inheritance is shown in this pedigree chart? Key: Affected O Carrier A. X-linked...
Genes A and B are linked and 32 map units apart (A is dominant over a, and B is dominant over b). If an Ab/aB heterozygote is test-crossed and you look at 100 offspring, how many offspring recessive for both phenotypes do you expect? Answer:
A female fly is heterozygous for three X-linked genes. The dominant alleles are ABC and the recessive alleles are abc. She is crossed with an abc/Y male. The following progeny phenotypes are produced. These phenotypes are equally divided between male and female flies. Abc 420 aBC 435 abc 55 ABC 60 abC 14 ABc 16 What is the distance between a and c in mu?
1) (3 pts) The following two recessive genes are known for corn: brittle endosperm (b) and glossy leaf (g). Two true-breeding plants with contrasting phenotypes are crossed (both plants are homozygous for both genes). The Fi offspring are all wild type. Then, an F1 plant is test-crossed with a brittle/glossy parent, and the following offspring are obtained: 16 238 wild type glossy brittle glossy, brittle 254 25 (a) Explain your reasoning as to why these data indicate that the two...
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