In German cockroaches, a curved wing (cv) is recessive to a normal wing (cv+), A homozygous...
In German cockroaches, a curved wing (cv) is recessive to a normal wing (cv+), A homozygous cockroach that has normal wings is crossed with a homozygous cockroach that has curved wings. The F1 are intercrossed to produce the F2. Assume that the pair of chromosomes containing the locus for wing shape is metacentric. Draw this pair of chromosomes as it would appear in the parents, the F1, and each class of F2 progeny at metaphase I of meiosis. Assume that no crossing over takes place. At each stage, label a location for the alleles for wing shape (cv and cv+) on the chromosomes.
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In German cockroaches, a curved wing (cv) is recessive to a
normal wing (cv+), A homozygous...
7.) Haemophilia is an X-linked recessive disorder. If a male haemophiliac mates with a normal (non-haemophiliac)...
7.) Haemophilia is an X-linked recessive disorder. If a male haemophiliac mates with a normal (non-haemophiliac) homozygous woman, would the progeny be affected? a. All males would be carriers. All females would be normal. b. All males would be normal. Half of the females would be carriers and half of the females would have haemophilia. c. All males would be normal. All females would be carriers. d. Half of each sex would be normal and half of each sex would...
PLEASE SHOW WORK In Drosophila curved-wing pattern (c) is recessive to straight wings (c): spineless bristles...
PLEASE SHOW WORK
In Drosophila curved-wing pattern (c) is recessive to straight wings (c): spineless bristles (s) are recessive to normal spiny bristles (s); and yellow body (y) is recessive to grey body (y). A trihybrid Drosophila fly with the genotype cvev ss y y is crossed with a triple homozygous recessive fly with the genotype cc ss yy cessyy X ce ss y The cross produces the following progeny: Number Phenotype straight, spineless, yellovw curved, spineless, grey curved, spineless,...
1. In Drosophila (fruit flies) Curly (c) wings are recessive and normal (C) wings are dominant....
1. In Drosophila (fruit flies) Curly (c) wings are recessive and normal (C) wings are dominant. If you cross curly wing flies with homozygous normal wing what is the expected genotype and phenotype of the F1 generation? What is the expected phenotypic ratio of the F2 generation?
"Ebony body, held-out wings and sepia eyes are ALL RECESSIVE AND ALL ON CHROMOSOME 3. The...
"Ebony body, held-out wings and sepia eyes are ALL RECESSIVE AND ALL ON CHROMOSOME 3. The COEFFICIENT of COINCIDENCE for chromosome 3 is 0.5. A homozygous ebony male is mated to a homozygous held out wing and sepia eyed female. The F1 are wild-type. An F1 female is test crossed to a fly that is homozygous for all three recessive alleles and they produce 1000 progeny. If ebony and held-out are separated by 12 map units, and held-out and sepia...
A pure-breeding fruit fly with curled wings mates with a pure-breeding fruit fly with normal (straight)...
A pure-breeding fruit fly with curled wings mates with a pure-breeding fruit fly with normal (straight) wings. The F1 mate with each other to produce an F2 generation that consists of 160 flies with curled wings and 80 with straight wings. What can you infer from this observation? A. Wing shape is controlled by two codominant alleles. B. All of the hybrid F1 flies had straight wings C. Two interacting genes determine wing shape. D. The dominant curled wing allele...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus. there is a dominant gene for red eyes and its recessive allele for purple eyes. A female that was heterozygous at both gene loci was mated with a male that is homozygous for both recessive alleles. Knowing this, complete the sentences with the correct terms. 94% crossing over independent assortment...
16. Use the following information to answer the questions below. Drosophila (fruit flies) usually have long...
16. Use the following information to answer the questions below. Drosophila (fruit flies) usually have long wings (+) but mutations in two different genes can result in bent wings (bt) or vestigial wings (vg). If a homozygous bent wing fly is mated with a homozygous vestigial wing fly, which of the following offspring would you expect? a. 1/2 bent and vestigial to 1/2 normal b. 1/2 bent and 1/2 vestigial flies c. 3/4 bent to 1/4 vestigial ratio d. all...
A homozygous variety of opium poppy (Papaver somniferum Laciniatum) with lacerate leaves was crossed with another...
A homozygous variety of opium poppy (Papaver somniferum Laciniatum) with lacerate leaves was crossed with another homozygous variety with normal leaves. All the Fj had lacerate leaves (jagged-edged leaves). Two F1 plants were crossed to produce the F2. Of the F2, 249 had lacerate leaves and 16 had normal leaves. How are lacerate leaves determined in the opium poppy? two genes, with a dominant allele at either or both loci one gene, with codominant alleles at a single locus two...
Drosophilia homozygous for the lobed eye mutation (L) were mated with flies homozygous for a wing...
Drosophilia homozygous for the lobed eye mutation (L) were mated with flies homozygous for a wing mutation known as plexus (px) All the f1 progeny had lobed eyes and wild type wings. The F1 flies were test crossed resulting in the following progeny: Number 18 F2 phenotypes Wild type eyes and wings Lobed eyes Plexus wings Lobed eyes and plexus wings 35 33 14 Write the genotypes of the parental and f1 flies. Use proper drosophilia nomenclature. Be sure to...
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,...
PLEASE SHOW WORK
In Drosophila curved-wing pattern (c) is recessive to straight wings (c): spineless bristles (s) are recessive to normal spiny bristles (s); and yellow body (y) is recessive to grey body (y). A trihybrid Drosophila fly with the genotype cvev ss y y is crossed with a triple homozygous recessive fly with the genotype cc ss yy cessyy X ce ss y The cross produces the following progeny: Number Phenotype straight, spineless, yellovw curved, spineless, grey curved, spineless,...
"Ebony body, held-out wings and sepia eyes are ALL RECESSIVE AND ALL ON CHROMOSOME 3. The COEFFICIENT of COINCIDENCE for chromosome 3 is 0.5. A homozygous ebony male is mated to a homozygous held out wing and sepia eyed female. The F1 are wild-type. An F1 female is test crossed to a fly that is homozygous for all three recessive alleles and they produce 1000 progeny. If ebony and held-out are separated by 12 map units, and held-out and sepia...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus. there is a dominant gene for red eyes and its recessive allele for purple eyes. A female that was heterozygous at both gene loci was mated with a male that is homozygous for both recessive alleles. Knowing this, complete the sentences with the correct terms. 94% crossing over independent assortment...
A homozygous variety of opium poppy (Papaver somniferum Laciniatum) with lacerate leaves was crossed with another homozygous variety with normal leaves. All the Fj had lacerate leaves (jagged-edged leaves). Two F1 plants were crossed to produce the F2. Of the F2, 249 had lacerate leaves and 16 had normal leaves. How are lacerate leaves determined in the opium poppy? two genes, with a dominant allele at either or both loci one gene, with codominant alleles at a single locus two...
Drosophilia homozygous for the lobed eye mutation (L) were mated with flies homozygous for a wing mutation known as plexus (px) All the f1 progeny had lobed eyes and wild type wings. The F1 flies were test crossed resulting in the following progeny: Number 18 F2 phenotypes Wild type eyes and wings Lobed eyes Plexus wings Lobed eyes and plexus wings 35 33 14 Write the genotypes of the parental and f1 flies. Use proper drosophilia nomenclature. Be sure to...
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,...
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