BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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A cross is made between a heterozygote, +++/abc, and a recessive homozygote, abc/abc. Analysis of the progeny gave the following results:
+ + +
450
+ + C
10
a + c
70
+ b c
210
+ b +
65
a + +
200
a bc
460
ab +
15
What is the map distance between the a and c genes?
O 25.12 map units
O 27.71 map units
O 29.39 map units
O 32.53 map units
O None of the above
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A cross is made between a heterozygote, +++/abc, and a recessive homozygote, abc/abc. Analysis of the progeny gave the following results:
450
10
a + c
70
+ b c
210
+ b +
65
a + +
200
abc
460
ab+
15
What is the map distance between the b and c genes?
O9.12 map units
O 10.81 map units
O 12.14 map units
O 13.95 map units
ONone of the above
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Two genes are 70 MU apart. How often would you expect to see recombinant progeny?
Select one:
O a. 50%
O b. 30%
O c. 25%
O d. 70%
O e. 100%
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Chapter 13 Solutions
BIOLOGY
Ch. 13.1 - Describe sex-linked inheritance in fruit flies.Ch. 13.1 - Prob. 2LOCh. 13.2 - Prob. 1LOCh. 13.2 - Explain the genetic consequences of dosage...Ch. 13.3 - Prob. 1LOCh. 13.4 - Prob. 1LOCh. 13.4 - Explain the relationship between frequency of...Ch. 13.4 - Prob. 3LOCh. 13.5 - Prob. 1LOCh. 13.5 - Prob. 2LO
Ch. 13.5 - Prob. 3LOCh. 13 - Inquiry question Mendel did not examine plant...Ch. 13 - What would Mendel have observed in a dihybrid...Ch. 13 - Prob. 2DACh. 13 - Why is the white-eye phenotype always observed in...Ch. 13 - In an organisms genome, autosomes are a. the...Ch. 13 - What cellular process is responsible for genetic...Ch. 13 - The map distance between two genes is determined...Ch. 13 - How many map units separate two alleles if the...Ch. 13 - How does maternal inheritance of mitochondrial...Ch. 13 - Which of the following genotypes due to...Ch. 13 - Prob. 1ACh. 13 - As real genetic distance increases, the distance...Ch. 13 - Down syndrome is the result of trisomy for...Ch. 13 - Genes that are on the same chromosome can show...Ch. 13 - The A and B genes are 10 cM apart on a chromosome....Ch. 13 - Prob. 6ACh. 13 - Color blindness is caused by a sex-linked,...Ch. 13 - Assume that the genes for seed color and seed...Ch. 13 - A low frequency of calico cats are male (about...
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- The following recombination frequencies are calculated for four linked genes in the image attached: What is the frequency of crossing-over between A and D? a. 8% b. 6% c. 15% d. 11%arrow_forwardIf these two individuals with the following characteristics are crossed Parent 1: blood type AB; heterozygous for H gene Parent 2: heterozygous B blood type; hh genotype What is the phenotypic ratio (blood type) of the F, generation? A. 4 AB: 1 A: 1 B: 2 0 B. 2 AB: 2 A: 4 B: no O C. 1 AB: 1 A: 2 B: 4 0 D. 1 AB: 1 A: 1 B: 10arrow_forwardFor the pedigree shown here, the disorder is caused by a recessive (g) allele on the X chromosome. Label each of the following individuals with the correct genotype (XGY, XgY, XGXG, XGXg, XgXg). a. Generation I, number 2 b. Generation II, number 2 c. Generation II, number 5 d. Generation III, number 2 e. Generation III, number 6arrow_forward
- The pedigree at right shows the expression of a dominant mutation. What is the probability that the child of II-3 and II-4 will express this trait? I II Select one: a. 1/4 b. 0 c. 1 d. 3/4 e. 1/2 12 3 456arrow_forwardA tall pea plant with purple flowers (both determined by dominant alleles) is crossed with a short plant with white flowers. there is no linkage of genes. if the tall, purple-flowered plant is heterozygous for both traits, the offspring will be: A 1 purple tall:1 white short B 3 purple tall:1 white short C 9 purple tall:3 purple short:3 white tall:1 white short D 1 purple tall:1 purple short:1 white tall:1 white shortarrow_forwardIf two gene pairs A and a and B and b are assorting independently with A dominant to a and B dominant to b, what is the probability of obtaining: a. an AB gamete from an AaBb individual? b. an AABB zygote from an AaBb x AaBb cross? c. an aaBb offspring from an AaBB x aabb cross? d. a phenotype aB from an Aabb x aaBb cross? e. an ab gamete from an aaBB individual?arrow_forward
- During a dihybrid cross involving two linked genes (two-point testcross), 20 flies showed recombinant phenotypes, whereas 480 flies showed the parental phenotypes. How far apart are these linked genes from each other? a. 20 cM b. 7.5 cM c. 4 cM d. 0.04 cM e. 8 cMarrow_forwardA number of all-white cats are crossed, and they produce the following types of progeny: 1216 all-white, 316 black, and 116 gray. What is the genotype of the black progeny? a. Aa b. Aa Bb c. A_B_ d. A_barrow_forwardA P cross of AAbb x aaBB is performed. An F1 offspring is crossed with an individual that is aabb. Determine which two of the following are the recombinant phenotypes. 1. Recessive a, recessive b 2. Dominant A, recessive b 3. Recessive a, dominant B 4. Dominant A, dominant Barrow_forward
- Red-flowering snapdragons are homozygous for allele R1. White-flowering snapdragons are homozygous for a different allele (R2). Heterozygous plants (R1R2) bear pink flowers. What phenotypes should appear among first-generation offspring of the crosses listed? What are the expected proportions for each phenotype? a. R1R1 × R1R2 c. R1R2 × R1R2 b. R1R1 × R2R2 d. R1R2 × R2Rarrow_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_forwardThe pedigree below is for a rare autosomal recessive trait with complete penetrance. I II III IV 2 1 2 3 9 2 2 3 1 4 3 4 5 4 probability that IV-1 is a carrier? a. What does the double horizontal line indicate? A Using A and a alleles, what is the genotype of III-2? A/ A What is thearrow_forward
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