Inquiry into Life
15th Edition
ISBN: 9781259426162
Author: Sylvia S. Mader Dr., Michael Windelspecht
Publisher: McGraw-Hill Education
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Chapter 24, Problem S23.4BYB
Section 23.4 how does a Punnett square help predict the genotype and
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3)
AA
AA
Consider the genetic cross for absent-mindedness, which is a dominant trait. All of the offspring from this cross will be
absent-minded. If two parents that are absent-minded have offspring that are not, what MUST be the genotypes of the
parents?
A)
aa X aa
B)
Aa X Aa
Aa X aa
D)
Aa X AA
In sexual reproduction, offspring are genetically different from the parents. This is because
What is a reciprocal cross?
Two pure-breeding mutant plants produce white flowers. When they are crossed, all of the progeny have wild-type purple flowers. What does this genetic complementation tell you?
A) The genes are part of two distinct biosynthetic pathways.
B) The two lines exhibit different mutations in the same gene.
C) More than one gene is involved in determining the phenotype.
D) The allele is pleiotropic.
E) The allele exhibits incomplete dominance.
Chapter 24 Solutions
Inquiry into Life
Ch. 24.1 - Prob. 1LOCh. 24.1 - Prob. 2LOCh. 24.1 - Prob. 1CYPCh. 24.1 - Prob. 2CYPCh. 24.1 - Prob. 1ACh. 24.1 - Prob. 2ACh. 24.2 - Prob. 1LOCh. 24.2 - Prob. 2LOCh. 24.2 - Prob. 3LOCh. 24.2 - Prob. 1QTC
Ch. 24.2 - Prob. 2QTCCh. 24.2 - Prob. 3QTCCh. 24.2 - Prob. 1CYPCh. 24.2 - Prob. 2CYPCh. 24.2 - Prob. 3CYPCh. 24.2 - Prob. 3ACh. 24.2 - Prob. 4ACh. 24.3 - Describe how chromosome number disorder arise?Ch. 24.3 - Prob. 2LOCh. 24.3 - Prob. 1CYPCh. 24.3 - Prob. 2CYPCh. 24.3 - Prob. 5ACh. 24.3 - Prob. 6ACh. 24.3 - Prob. 7ACh. 24.3 - Prob. 8ACh. 24.3 - Prob. 9ACh. 24.4 - Prob. 1LOCh. 24.4 - 2. Summarize the disorder caused by changes in...Ch. 24.4 - Prob. 1CYPCh. 24.4 - Explain how it is possible for a person with a...Ch. 24.4 - Prob. 10ACh. 24.4 - Prob. 11ACh. 24.4 - Prob. 12ACh. 24.4 - Prob. 13ACh. 24 - Prob. S5.4BYBCh. 24 - Prob. S23.1BYBCh. 24 - Section 23.4 how does a Punnett square help...Ch. 24 - Prob. 1CSCh. 24 - What is the genetic basis that causes the symptoms...Ch. 24 - Prob. 3CSCh. 24 - Prob. 1TCCh. 24 - Prob. 2TCCh. 24 - Prob. 3TCCh. 24 - Prob. 4TC
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Duchenne Muscular Dystrophy (DMD) is a sex- linked, recessive disease in which a mutation in the gene for dystrophin results in muscle cell degeneration. A normal man marries a woman who is a carrier for DMD. a) What are the parent genotypes? b) What are the four possible offspring genotypes from this cross? HINT - do a Punnett Square to figure this out! c) If they have four sons, how many of them will have DMD? ( d) If they have eight children, how many will be carriers of DMD? BONUS (+1): Why are males more often affected by sex-linked disorders than females?arrow_forward1) What is the difference between a monohybrid cross and a dihybrid cross? 2) What does it mean to have a sex-linked characteristic?arrow_forwardSuppose that red flower color (RR or Rr) is dominant to white flower color (rr) in a petunia. A friend has a petunia plant with red flowers and wants to determine whether the plant is RR or Rr. A) What cross could you perform to help your friend determine the genotype of his petunia plant? B) How will this cross help you determine the genotype of your friend's red- flowered petunia? That is, how will the results from this cross differ if the red-flowered petunia is RR versus Rr?arrow_forward
- 22) What is the probability of obtaining a homozygous recessive individual from a cross between two individuals that are heterozygous? A) ½ To B) 4 C) % D) 0 werl ue wane esarrow_forwardHow many distinct phenotypes will a AaBbCc x aaBBCc cross have?arrow_forwardIn cats, long hair is recessive to short hair. A short-haired male is mated to a long-haired female. a) What are all possible genotypes of these two cats? b) What alleles will the gametes of each of these cats contain in their chromosomes?c) What will the kittens from all possible crosses between these two cats look like?d) Two cats are mated. One of the parent cats is long-haired. The litter which results contains two short-haired and three long-haired kittens. What length fur does the second parent have, and what is its genotype?Cats also have a locus (gene) for a character called agouti. In cats with agouti fur, pigment is unevenly distributed (see Fig. 1). The agouti allele is dominant to the allele for regular fur. A male cat who long haired and is heterozygous for agouti fur is crossed with a female who has regular, non-agouti fur and is homozygous for short fur. a) What are the genotypes of these cats? b) What are all of the possible allelic combinations in the gametes from each…arrow_forward
- In the classic "X" figure of the chromosome, is the whole X from one parent, or is one side of the X from the mother and the other side from the father?arrow_forwardThe expected ratio of phenotypes among the progeny of a test cross is 1:1:1:1. Out of 200 total resulting progeny, 48 occur in one of the four phenotypic classes. Given this information, which of the following must also be true? a)At least one additional cell must also contain a count of 48. b)The progeny of this cross do not conform to a 1:1:1:1ratio. c)The value of observed - expected for this cell = -2. d)Since 48 is so close to the expected value, there is no need to calculate chi square before drawing a conclusion about the ratio.arrow_forwardYou perform a cross between a parent with the genotype WWiiNNttEErr and another parent that is wwllnnTTeerr. All genes are unlinked except for W and I which are 22 mu apart. You take an F1 from this cross and cross it with an individual that is wwiiNntteerr. a) What is the probability that this final cross yields an offspring that is wwiinntteerr? b) What is the probability that this final cross yields an offspring that is NNTT or Nntt. (You can ignore all of the other genes for this question.)arrow_forward
- What are the two different meanings of horizontal lines in a pedigree?arrow_forwardOne example of codominance found in animals is the speckled chicken. This organism has alleles for both black and white feathers. What is the ratio of the genotype if the speckled chicken is crossed to a homozygous black chicken? Explain. A) 1:1:1:1 B) 2:1:1 C) 2:2 D) 3:1arrow_forwardImagine a test cross for an unknown exhibiting 2 traits, where half of the offspring exhibit both dominant traits and the other half exhibits one dominant and one recessive trait. What can you conclude about the unknown? options: A) The unknown is homozygous dominant for both traits. B) The unknown is homozygous recessive for both traits. C) The unknown is heterozygous for both traits. D) The unknown is homozygous for one gene and heterozygous for the other. E) There is not enough information to determine the answer.arrow_forward
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