Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 4, Problem 21CONQ
The trait of feathering in fowls is a sex-limited trait controlled by a single gene. Females always exhibit hen-feathering, as do HH and
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Feather colour in parakeets is controlled by two genes. Blue colour (B) is dominant over absence of colour (b). Yellow colour (Y) is dominant over absence of colour (y). When a B allele and a Y allele are present, a green parakeet is produced.The probability of obtaining a female or male parakeet is the same as for humans.
A green parakeet crossed with a white parakeet produced offspring with four different colour patterns.What is the genotype of the green parakeet? Answer
Feather colour in parakeets is controlled by two genes. Blue colour (B) is dominant over absence of colour (b). Yellow colour (Y) is dominant over absence of colour (y). When a B allele and a Y allele are present, a green parakeet is produced.The probability of obtaining a female or male parakeet is the same as for humans.
A green parakeet crossed with a white parakeet produced offspring with four different colour patterns.What is the genotype of the green parakeet?
** select one option from picture
A particular species of flowering plant comes in three colors: Red, Blue, and Purple. Red is considered homozygous dominant, blue is considered homozygous recessive, and purple is considered heterozygous. Please use F to represent dominant alleles and f to represent recessive alleles.
A member of this plant species that makes red flowers cross-pollinates with a member of the same species that makes blue flowers. In your answer, please state the mode of inheritance, the genotypes of both parents, and the genotypic and phenotypic ratios of the offspring.
Chapter 4 Solutions
Genetics: Analysis and Principles
Ch. 4.1 - 1. Which of the following statements is true?
a....Ch. 4.2 - 1. Which of the following is not an example of a...Ch. 4.2 - Prob. 2COMQCh. 4.2 - 3. Polydactyly is a condition in which a person...Ch. 4.3 - The outcome of an individuals traits is controlled...Ch. 4.4 - Prob. 1COMQCh. 4.4 - Prob. 2COMQCh. 4.5 - Prob. 1COMQCh. 4.5 - Hemophilia is a blood-clotting disorder in humans...Ch. 4.6 - Prob. 1COMQ
Ch. 4.7 - 1. The Manx phenotype in cats is caused by a...Ch. 4.8 - Which of the following is a possible explanation...Ch. 4.9 - 1. Two different strains of sweet peas are...Ch. 4.9 - If the F1 offspring from question 1 are allowed to...Ch. 4 - 1. Describe the differences among dominance,...Ch. 4 - Discuss the differences among sex-influenced,...Ch. 4 - 3. What is meant by a gene interaction? How can a...Ch. 4 - Lets suppose a recessive allele encodes a...Ch. 4 - 5. A nectarine is a peach without the fuzz. The...Ch. 4 - 6. An allele in Drosophila produces a star-eye...Ch. 4 - A seed dealer wants to sell four-oclock seeds that...Ch. 4 - 8. The blood serum from one individual (let’s call...Ch. 4 - 9. Which blood type phenotypes (A, B, AB, and/or...Ch. 4 - A woman with type B blood has a child with type O...Ch. 4 - A type A woman is the daughter of a type O father...Ch. 4 - In Shorthorn cattle, coat color is controlled by a...Ch. 4 - In chickens, the Leghorn variety has white...Ch. 4 - Propose the most likely mode of inheritance...Ch. 4 - 15. A human disease known as vitamin D-resistant...Ch. 4 - 16. Hemophilia is an X-linked recessive trait in...Ch. 4 - 17. Incontinentia pigmenti, a rare, X-linked...Ch. 4 - 18. Scurs in cattle is a sex-influenced trait. A...Ch. 4 - In rabbits, the color of body fat is controlled by...Ch. 4 - Prob. 20CONQCh. 4 - 21. The trait of feathering in fowls is a...Ch. 4 - Based on the pedigree shown here for a trait...Ch. 4 - 23. The pedigree shown here involves a trait...Ch. 4 - Lets suppose you have pedigree data from thousands...Ch. 4 - Prob. 25CONQCh. 4 - 26. In humans, a very rare dominant allele that...Ch. 4 - 27. A sex-influenced trait in humans affects the...Ch. 4 - Three coat-color patterns that occur in some...Ch. 4 - Prob. 1EQCh. 4 - 2. In chickens, some varieties have feathered...Ch. 4 - 3. In sheep, the formation of horns is a...Ch. 4 - Prob. 4EQCh. 4 - In the clover butterfly, males are always yellow,...Ch. 4 - The Mic2 gene in humans is present on both the X...Ch. 4 - 7. Duroc Jersey pigs are typically red, but a...Ch. 4 - 8. As shown in Figure 4.17, coat color in rodents...Ch. 4 - 9. Summer squash exist in long, spherical, or disk...Ch. 4 - In a species of plant, two genes control flower...Ch. 4 - 11. Red eyes is the wild-type phenotype in...Ch. 4 - 12. As mentioned in Experimental Question E11, red...Ch. 4 - Lets suppose you were looking through a vial of...Ch. 4 - 14. When examining a human pedigree, what features...Ch. 4 - Lets suppose a gene exists as a functional...Ch. 4 - In oats, the color of the chaff is determined by a...
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- A guinea pig that is heterozygous for fur color and texture mates with another guinea pig heterozygous for both traits. They produce 96 offspring. How do I draw a Punnett Square for this information?arrow_forwardIn watermelons, the allele for green fruit is autosomal dominant (G) over the striped fruit (gg). The allele for short fruit (B) is dominant over the allele for ong fruit (bb). A green short watermelon plant that is heterozygous forr both traits is crossed with a striped long waterelon plant. What are the chances for their of their offspring to be striped and short? Green short genotype: Green short gametes allele: Striped long genotype: Striped long gametes allele:arrow_forwardThe human trait for blue eyes is recessive to the trait brown eyes (brown eyes is dominant). When a parent with blue eyes (bb) mates with a parent heterozygous for brown eyes (Bb), what is the expected genotypic ratio of their offspring?arrow_forward
- In walruses which have one progeny per mating, small body mass (-) is a sex- influenced trait that acts dominantly in females but acts recessively in males compared to large body mass (+). Select all of the statements below that are true. Leave any statements that are false un-selected. A large-bodied female and a large-bodied male can have a small-bodied female offspring. A large-bodied female and a small-bodied male can have a large-bodied female offspring. A small-bodied female and a large-bodied male can have a large-bodied male offspring. 1. . :1 1 - A small-bodied female and a small-bodied male can have a large-bodied female offspring. CS Scanned with CamScannerarrow_forwardIn mice, there is an allele that in the heterozygous condition, produces mice with yellow coats. Mice that are homozygous recessive for the allele have white-color coats. Homozygous dominant mice abort early or are born stillborn. If a yellow male is mated to female yellow mouse, what is the phenotypic ratio you would expect among the 15 living offspring? (Show your work below.)arrow_forwardFeather colour in parakeets is controlled by two genes. Blue colour (B) is dominant over absence of colour (b). Yellow colour (Y) is dominant over absence of colour (y). When a B allele and a Yallele are present, a green parakeet is produced. The probability of obtaining a female or male parakeet is the same as for humans. A green parakeet crossed with a white parakeet produced offspring with four different colour patterns. What is the genotype of the green parakeet? Answer (choose between options in picture)arrow_forward
- In Drosophila (fruit flies) the gene for eye color is X-linked. The allele R codes for red eyes and is dominant to its allele r, which codes for white eyes. Give the genotypic and phenotypic ratios for the expected offspring from mating a white eyed male and a heterozygous red eyed female.arrow_forwardThe trait of feathering in fowls is a sex-limited trait controlled bya single gene. Females always exhibit hen-feathering, as do HHand Hh males. Only hh males show cock-feathering. Startingwith two heterozygous birds that are hen-feathered, explain howyou would obtain a true-breeding line that always produced cockfeathered males.arrow_forwardHeterozygous Cc chickens express a condition called creeper, in which the leg and wing bones are shorter than normal (cc). The dominant C allele is lethal when homozygous. Skin color is determined by the alleles W and w. W_ chickens have white skin and ww chickens have yellow skin. In a mating between 2 chickens heterozygous for both of these genes: 1) What phenotypes will be observed in the progeny? 2) What fraction of the offspring will have each phenotype? Assign alleles. List possible phentoypes. Make gametes, draw Punnett square, and list fractions of genotypes and/or phenotypes of offspring,arrow_forward
- In certain lizards, scaly skin is dominant to smooth skin and speckled color is dominant to grey color. These traits are inherited according to traditional Mendelian genetics (no linkage). The total progeny for a breeding pair of lizards resulted in the offspring listed below. What are the genotypes of the male and female parents? 102 scaly skinned, speckled off spring 110 smooth skinned, speckled offspring 38 scaly skinned, grey offspring 32 smooth skinned, grey offspringarrow_forwardKayla breeds and sells true-breeding green tree frogs. At a frog convention, she bought a single yellow tree frog from a breeder who told her the yellow color was an autosomal recessive trait. Describe a breeding program Kayla could use to establish a strain of all yellow frogs to sell. Include the phenotypic and genotypic ratios of offspring in each generation (F1, F2, etc.). You may assume that Kayla can get hundreds of offspring from each mated pair, and that it's ethically okay for sibling frogs to mate.arrow_forwardIn snapdragons, flower color shows incomplete dominance. Plant height (tall or short) is a standard dominant/recessive trait. If you cross a red-flowered, heterozygous tall plant with a white-flowered, heterozygous tall plant, how many of the offspring would you expect to have pink flowers and be short?arrow_forward
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