Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 2.2, Problem 2COMQ
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A cross is made between a pea plant that is RrYy and one that isrrYy. What is the predicted outcome of the seed phenotypes?a. 9 round, yellow : 3 round, green : 3 wrinkled, yellow :1 wrinkled, greenb. 3 round, yellow : 3 round, green : 1 wrinkled, yellow :1 wrinkled, green
c. 3 round, yellow : 1 round, green : 3 wrinkled, yellow :1 wrinkled, greend. 1 round, yellow : 1 round, green : 1 wrinkled, yellow :1 wrinkled, green
If several pea plants with the genotype TtYy are crossed with pea plants with the genotype TtYy, what is the probability of producing the genotype TTYY in offspring?
A. 1/16
B. 1/2
C.1/4
D.1/8
In certain plants, the tall trait is dominant to the short trait. If a heterozygous plant is crossed with a homozygous short plant, what is the percentage that the offspring will be short?
a.
100%
b.
50%
c.
25%
d.
0%
Chapter 2 Solutions
Genetics: Analysis and Principles
Ch. 2.1 - 1. Experimental advantages of using pea plants...Ch. 2.1 - The term cross refers to an experiment in which a....Ch. 2.1 - 3. To avoid self-fertilization in his pea plants,...Ch. 2.2 - Prob. 1COMQCh. 2.2 - Prob. 2COMQCh. 2.3 - A pea plant has the genotype rrYy. How many...Ch. 2.3 - A cross is made between a pea plant that is RrYy...Ch. 2.3 - Prob. 3COMQCh. 2.4 - Which of the following would not be observed in a...Ch. 2.4 - Prob. 2COMQ
Ch. 2.5 - A cross is made between AABbCcDd and AaBbccdd...Ch. 2.5 - Prob. 2COMQCh. 2.5 - Prob. 3COMQCh. 2 - 1. Why did Mendel’s work refute the idea of...Ch. 2 - 2. What is the difference between...Ch. 2 - 3. Describe the difference between genotype and...Ch. 2 - 4. With regard to genotypes, what is a...Ch. 2 - 5. How can you determine whether an organism is...Ch. 2 - In your own words, describe Mendels law of...Ch. 2 - Based on genes in pea plants that we have...Ch. 2 - Prob. 8CONQCh. 2 - Do you know the genotype of an individual with a...Ch. 2 - 10. A cross is made between a pea plant that has...Ch. 2 - Prob. 11CONQCh. 2 - 12. Describe the significance of nonparentals with...Ch. 2 - For the following pedigrees, describe what you...Ch. 2 - Ectrodactyly, also known as lobster claw syndrome,...Ch. 2 - Identical twins are produced from the same sperm...Ch. 2 - In cocker spaniels, solid coat color is dominant...Ch. 2 - A cross was made between a white male dog and two...Ch. 2 - 18. In humans, the allele for brown eye color (B)...Ch. 2 - Albinism, a condition characterized by a partial...Ch. 2 - A true-breeding tall plant was crossed to a dwarf...Ch. 2 - 21. For pea plants with the following genotypes,...Ch. 2 - 22. An individual has the genotypeand makes an...Ch. 2 - 23. In people with maple syrup urine disease, the...Ch. 2 - Prob. 24CONQCh. 2 - 25. A true-breeding pea plant with round and Page...Ch. 2 - Prob. 26CONQCh. 2 - 27. What are the expected phenotypic ratios from...Ch. 2 - Prob. 28CONQCh. 2 - Prob. 29CONQCh. 2 - A pea plant that is dwarf with green, wrinkled...Ch. 2 - 31. A true-breeding plant with round and green...Ch. 2 - Wooly hair is a rare dominant trait found in...Ch. 2 - Huntington disease is a rare dominant trait that...Ch. 2 - 34. A woman with achondroplasia (a dominant form...Ch. 2 - 1. Describe three advantages of using pea plants...Ch. 2 - Explain the technical differences between a...Ch. 2 - 3. How long did it take Mendel to complete the...Ch. 2 - 4. For all seven characters described in the data...Ch. 2 - From the point of view of crosses and data...Ch. 2 - 6. As in many animals, albino coat color is a...Ch. 2 - 7. The fungus Melampsora lini causes a disease...Ch. 2 - For Mendels data for the experiment in Figure 2.8,...Ch. 2 - 9. Would it be possible to deduce the law of...Ch. 2 - In fruit flies, curved wings are recessive to...Ch. 2 - A recessive allele in mice results in an unusally...Ch. 2 - Prob. 12EQCh. 2 - Prob. 13EQCh. 2 - Prob. 14EQCh. 2 - 15. A cross was made between two strains of plants...Ch. 2 - A cross was made between two pea plants, TtAa and...Ch. 2 - Consider this four-factor cross: TtRryyAaTtRRYyaa,...
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- The pea plants used in Mendel’s genetic inheritance studies were diploid, with 14 chromosomes in somatic cells. Assuming no crossing over events occur, how many unique gametes could one pea plant produce? a. 28 b. 128 c. 196 d. 16,384arrow_forwardTwo summer white squashes with genotype WwYy were crossed (W= white color, Y=yellow color, w and y= green color) W is epistatic to Y and y. What would be the different colors of summer squashes obtained out of the above cross? (2 pts.) A. 12 white: 3 yellow:1 green B. 12 yellow: 3 white: 1 green C. 12 green: 1 white: 3 yellow D. 12 yellow: 3 green: 1 whitearrow_forwardSuppose 1000 pea plants are produced from Tt crossed with tt. A.many of them are expected to be tall ? B. how many of them are expected to be pure tall ? C. how many of them are expected to be pure short D. how many of them are expected to be hybrid ?arrow_forward
- You cross a pea plant with the genotype AaBbCcDd to one with the genotype AabbCcdd. What is the chance that the offspring is aabbccDd? a. 1/128 b. 1/256 c. 1/64 d. 1/4arrow_forwardA pea plant has the genotype rrYy. How many different types ofgametes can it make and in what proportions?a. 1 rr : 1 Yyb. 1 rY : 1 ryc. 3 rY : 1 ryd. 1 RY : 1 rY : 1 Ry : 1 ryarrow_forwardIn tomatoes, round fruit is dominant over elongated fruit, and smooth skin is dominant over fuzzy or peach skin. An RS/rs plant is test-crossed and 1000 progeny are obtained. If the genes have a frequency of recombination of 26%, how many will be elongated and peach skin? A. 370 B. 260 C. 130 D. 740arrow_forward
- Yellow Dominant pea Seed with unknown genotype (YY or Yy) is test-crossed with green homozygous recessive pea seed (yy). After the test cross, the genotype of yellow dominant seed is Yy. What was the result of Cross that confirmed the genotype as Yy? a. All green seeds b. 50% yellow and 50% green seeds (½ : ½). c. All yellow seeds d. 75% yellow and 25% green seeds (3:1)arrow_forwardYou cross two pea plants both from pure breeding lines. One has hairy leaves and the other has smooth leaves. All the offspring have hairy leaves. If you take one of the offspring (F1) and cross it back to smooth-leaved plant what phenotypic ratio do you expect in the next generation? Group of answer choices A. half smooth and half hairy B. all smooth C. all hairy D. 3/4 hairy and 1/4 smootharrow_forwardIf a male bird that is heterozygous for a recessive Z-linked mutation is crossed to a wild type female, what proportion of the progeny will be mutant males? A. 50% B. 0% C. 75% D. 100%arrow_forward
- A gardener pertorms a mononybra cross on two heterozygous orange-fruitea tomato plants. Plants expressing the recessive phenotype yield yellow tomato fruits. What percentage of the offspring will produce yellow tomatoes? A:75% B:50% C:100% D:25%arrow_forwardAssuming no gene linkage, in a dihybrid cross ofAABB x aabb with AaBb F1 heterozygotes, what is the ratio of the F1 gametes (AB, aB,Ab, ab) that will give rise to the F2 offspring? a. 1:1:1:1 b. 1:3:3:1 c. 1:2:2:1 d. 4:3:2:1arrow_forwardAn incompletely dominant gene controls flower petal color in carnations, where R is red and W is white. If two pink carnations are crossed and produce 40 offspring, how many of these offspring would you expect to be red? A. 40 B. 0 C. 20 D. 30 E. 10arrow_forward
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