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1) (3 pts) The following two recessive genes are known for corn: brittle endosperm (b) and...
Three genes with recessive mutant phenotypes are located on the same chromosome in maize: waxy endosperm...
Three genes with recessive mutant phenotypes are located on the same chromosome in maize: waxy endosperm (wx), shrunken endosperm (sh), and virescent seedling (v). A plant with all three mutant phenotypes is crossed with a true-breeding, wild-type plant. Resulting F1 plants are then backcrossed to the parental mutant line to produce the following progeny: Waxy Shrunken Virescent Number wx sh + 89 + + v 92 + + + 1482 wx sh v 1475 + sh + 480 wx +...
The recessive gene sh produces shrunken endosperm in corn kernels and its dominant allele sh+ produces...
The recessive gene sh produces shrunken endosperm in corn kernels and its dominant allele sh+ produces full, plump kernels. The recessive gene c produces colorful endosperm and its dominant allele c+ produces colored endosperm. Two homozygous plants are crossed, producing and F1 all phenotypically plump and colored. The F1 plants are testcrossed and the following offspring were produced: 149 shrunken, colored, 4035 shrunken, colorless, 152 plump, colorless and 4032 plump, colored. a. What were the phenotypes and genotypes of the...
Three genes with recessive mutant phenotypes are located on the same chromosome in maize: short stem...
Three genes with recessive mutant phenotypes are located on the same chromosome in maize: short stem (ss), defective endosperm (de), and virescent seedling (v). A plant with all three mutant phenotypes is crossed with a true-breeding, wild-type plant. Resulting F1 plants are then backcrossed to the parental mutant line to produce the following progeny: Waxy Shrunken Virescent Number ss + + 290 + de v 282 ss de + 89 + ...
1. Maize plants homozygous for the recessive gene "variable sterile" (va) exhibit irregular distribution of chromosomes...
1. Maize plants homozygous for the recessive gene "variable sterile" (va) exhibit irregular distribution of chromosomes during meiosis. Yellowish-green seedlings are the results of another recessive gene called "virescent" (v). A third recessive called "glossy" (g) produces shinny leaves. All three genes are linked. Two homozygous plants were crossed and produced an all normal F1. When the F were testcrossed, progeny phenotypes appeared as follows. virescent /V) 60 virescent, glossy (V,g 7 48 glossy g) variable sterile, virescent, glossy (Va,v,...
23. R. A. Emerson crossed two different pure breeding lines type Fl that was heterozygous for...
23. R. A. Emerson crossed two different pure breeding lines type Fl that was heterozygous for three alleles that determine recessive phenotypes. Terent pure-breeding lines of corn and obtained a phenotypically wild- anther, br, brachytic; and f, fine. He testcrossed the F1 with a tester that was homoly mine recessive phenotypes: an determines the three genes and obtained these progeny phenoty with a tester that was homozygous recessive for ained these progeny phenotypes: 355 anther: 339 brachytic, fine: 88 completely...
Explain Both and Answer Thank You The eyeless trait is recessive in Drosophila. One of the...
Explain Both and Answer Thank You
The eyeless trait is recessive in Drosophila. One of the offspring of a cross between heterozygote (Ee) parents has eyes. How would you determine whether this fly is homozygous (EE) or heterozygous (Ee)? Cross it with a fly that has eyes but an unknown genotype Cross it with a heterozygous fly Cross it with an eyeless fly Cross it with a fly that has eyes and an EE genotype Question 23 3 pts A...
THIS information pertains to Questions 6-7: In corn, 3 genes (P. Su and Tls) are linked...
THIS information pertains to Questions 6-7: In corn, 3 genes (P. Su and Tls) are linked on a chromosome as shown below: Su Tls 12 m.u. | 18 m.u. At each gene, two alleles exist with the mutant allele recessive to the wild type allele. A true- breeding individual with mutant phenotype for gene P is crossed to a true-breeding individual with mutant phenotype for Su and Tls. pttx o su TIS 6. The Fl is test-crossed. Assuming no interference,...
A wild type plant that is heterozygous at the mangled leaf, prickly fruit, and limp stem...
A wild type plant that is heterozygous at the mangled leaf, prickly fruit, and limp stem loci is crossed with a plant that is homozygous recessive for each. The two least common phenotypes among the offspring were mangled leaves, prickly fruit, normal stem and normal leaves, normal fruit, limp stem. What is the order of the three genes? it is impossible to tell mangled leaf, limp stem, prickly fruit limp stem, mangled leaf, prickly fruit mangled leaf, prickly fruit, limp...
717 pts). In Drosophila, two recessive mutations delta vein (d) and rough eye (r) both map...
717 pts). In Drosophila, two recessive mutations delta vein (d) and rough eye (r) both map to chromosome 3 and are known to be 20 m.u. apart. Another recessive mutation, garnet eye color (a) has been mapped to the X chromosome. A delta veined, rough and garnet eyed- female was crossed to a wild-type male. The resulting fī females are testcrossed to delta-veined, rough and, garnet-eyed males. dng larg & ORG/ A. (6pts) Write the genotype of the Fı female...
Researchers investigating chromosome 9 of com, Zea mays, found four mutations. Interested in finding the relative...
Researchers investigating chromosome 9 of com, Zea mays, found four mutations. Interested in finding the relative locations of the four mutations, they bred two different triple mutant strains. One of the strains displayed phenotypes of male sterility (ms), white endosperm cap (wec), and brown midrib (brm). The other strain displayed the phenotypes of male sterility, white endosperm cap, and brittle stalk (bst). They crossed both mutant strains with a true breeding wild type strain to create two F, hybrids. They...
1. Maize plants homozygous for the recessive gene "variable sterile" (va) exhibit irregular distribution of chromosomes during meiosis. Yellowish-green seedlings are the results of another recessive gene called "virescent" (v). A third recessive called "glossy" (g) produces shinny leaves. All three genes are linked. Two homozygous plants were crossed and produced an all normal F1. When the F were testcrossed, progeny phenotypes appeared as follows. virescent /V) 60 virescent, glossy (V,g 7 48 glossy g) variable sterile, virescent, glossy (Va,v,...
23. R. A. Emerson crossed two different pure breeding lines type Fl that was heterozygous for three alleles that determine recessive phenotypes. Terent pure-breeding lines of corn and obtained a phenotypically wild- anther, br, brachytic; and f, fine. He testcrossed the F1 with a tester that was homoly mine recessive phenotypes: an determines the three genes and obtained these progeny phenoty with a tester that was homozygous recessive for ained these progeny phenotypes: 355 anther: 339 brachytic, fine: 88 completely...
Explain Both and Answer Thank You
The eyeless trait is recessive in Drosophila. One of the offspring of a cross between heterozygote (Ee) parents has eyes. How would you determine whether this fly is homozygous (EE) or heterozygous (Ee)? Cross it with a fly that has eyes but an unknown genotype Cross it with a heterozygous fly Cross it with an eyeless fly Cross it with a fly that has eyes and an EE genotype Question 23 3 pts A...
THIS information pertains to Questions 6-7: In corn, 3 genes (P. Su and Tls) are linked on a chromosome as shown below: Su Tls 12 m.u. | 18 m.u. At each gene, two alleles exist with the mutant allele recessive to the wild type allele. A true- breeding individual with mutant phenotype for gene P is crossed to a true-breeding individual with mutant phenotype for Su and Tls. pttx o su TIS 6. The Fl is test-crossed. Assuming no interference,...
A wild type plant that is heterozygous at the mangled leaf, prickly fruit, and limp stem loci is crossed with a plant that is homozygous recessive for each. The two least common phenotypes among the offspring were mangled leaves, prickly fruit, normal stem and normal leaves, normal fruit, limp stem. What is the order of the three genes? it is impossible to tell mangled leaf, limp stem, prickly fruit limp stem, mangled leaf, prickly fruit mangled leaf, prickly fruit, limp...
717 pts). In Drosophila, two recessive mutations delta vein (d) and rough eye (r) both map to chromosome 3 and are known to be 20 m.u. apart. Another recessive mutation, garnet eye color (a) has been mapped to the X chromosome. A delta veined, rough and garnet eyed- female was crossed to a wild-type male. The resulting fī females are testcrossed to delta-veined, rough and, garnet-eyed males. dng larg & ORG/ A. (6pts) Write the genotype of the Fı female...
Researchers investigating chromosome 9 of com, Zea mays, found four mutations. Interested in finding the relative locations of the four mutations, they bred two different triple mutant strains. One of the strains displayed phenotypes of male sterility (ms), white endosperm cap (wec), and brown midrib (brm). The other strain displayed the phenotypes of male sterility, white endosperm cap, and brittle stalk (bst). They crossed both mutant strains with a true breeding wild type strain to create two F, hybrids. They...
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