Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 12, Problem 3TYK
Summary Introduction
To review:
On the basis of the data for the genotype, the types of gametes formed and their proportion, for the following pairs:
a. AABB
b. AaBB
c. Aabb
d. AaBb
One gene has the alleles A and a whereas another gene has the alleles B and b. A and B represent the dominant alleles while a and b represent the recessive alleles.
Introduction:
When a homozygous allelic pair divides, it forms the same genes with both coding either for dominant genes or for recessive genes. When a heterozygous allelic pair divides, it forms two genes that code for dominant genes and recessive genes. In the case of independent assortment, each characteristic separate into gametes independently when there are two or more characteristics to be inherited.
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Students have asked these similar questions
When a chromosome is doubled, the two parts have... Group of answer choices
A. the same genes and the same alleles
B. different genes and different alleles
C. the same genes but maybe not the same alleles
D. the same alleles but maybe not the same genes
Is it possible for a bald man and a nonbald woman to have a nonbald son and bald daughter?
A. Yes, if the father is homozygous and the mother is heterozygous.
B. Yes, if both parents are heterozygous.
C. No, it is not possible.
D. Yes, if the father is heterozygous and the mother is homozygous.
a) A woman who is type A has a daughter who is type O. Give the genotypes of both the mother and of the daughter.
b) The mother claims a man who is type B is the father. Is that possible? Explain.
c) The accused man can prove that both of his parents are type AB. Is it possible for him to be type B? If so, what is his genotype?
d) Does the answer in part c change the answer in part b?
Chapter 12 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 12.1 - Two pairs of traits are segregating in a cross....Ch. 12.1 - If, instead, the four phenotypes in question 1...Ch. 12.2 - Palomino horses have a golden coat color, with a...Ch. 12.2 - A true-breeding rabbit with agouti (mottled,...Ch. 12 - The dominant C allele of a gene that controls...Ch. 12 - In peas, the allele Le produces tall plants and...Ch. 12 - Prob. 3TYKCh. 12 - What genotypes, and in what frequencies, will be...Ch. 12 - In addition to the two genes in problem 4, assume...Ch. 12 - Prob. 6TYK
Ch. 12 - In cats, the genotype AA produces tabby fur color;...Ch. 12 - Prob. 8TYKCh. 12 - The ability of humans to taste the bitter chemical...Ch. 12 - A man is homozygous dominant for alleles at 10...Ch. 12 - In guinea pigs, an allele for rough fur (R) is...Ch. 12 - Prob. 12TYKCh. 12 - Some recessive alleles have such a detrimental...Ch. 12 - In chickens, feathered legs are produced by a...Ch. 12 - A mix-up in a hospital ward caused a mother with O...Ch. 12 - Having malformed hands with shortened fingers is a...Ch. 12 - Prob. 17TYKCh. 12 - Design an Experiment Imagine that you are a...Ch. 12 - Prob. 19TYKCh. 12 - Prob. 1ITDCh. 12 - Prob. 2ITDCh. 12 - Half of the worlds population eats rice at least...
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- The phenotype of individuals heterozygous for ________ alleles comprises both homozygous phenotypes. a. epistatic c. pleiotropic b. codominant d. hybridarrow_forwardWhat are the types of gametes that can be produced by an individual with the genotype AaBb? a. Aa,Bb b. AA, aa, BB. bb c. AB, Ab, aB, ab d. AB,abarrow_forwardIn a diploid species, each individual possesses (a) one allele for each locus (b) two alleles for each locus (c) three or more alleles for each locus (d) all the alleles found in the gene pool (e) half of the alleles found in the gene poolarrow_forward
- If an organism has two different alleles (call the alleles a andb) of a gene,a. its phenotype will be the same as an organism with twoidentical alleles of this gene.b. all of its gametes will contain both the a allele and theb allele.c. it is homozygous for that gene.d. it is heterozygous for that gene.arrow_forwardCystic fibrosis is a genetic disease caused by a recessive allele. Two parents without the disease have a child with the disease, indicating they are both heterozygotes. Assuming that the child did not have a mutation giving it the disease, what is the probability that a second child of the same parents would have the disease? Group of answer choices a. 1 b. 0.25 c. 0 d. 0.5arrow_forwardStraight hair is dominant to curly. However, heterozygotes of this gene have wavy hair. If a mother with wavy hair mates with a father with straight hair, what would be the genotype ratio of the possible offspring? A) 2:2:2 B) 0:2:2 C) 2:2:0 D) 2:0:2arrow_forward
- Which of the following is false, regarding the law of segregation? A. It states that each of two alleles for a given trait segregate into different gametes. B. It can be explained by the segregation of sister chromatids during mitosis. C. It can account for the 3:1 ratio seen in the F2 generation of Mendel's crosses. D. It can be used to predict the likelihood of transmission of certain genetic diseases within families.arrow_forwardWhich of the following CANNOT be true about the inheriteance the trait depicted in the pedigree diagram below? A. It is recessive B. It is dominant C. It is on the X chromosome D. It is recessive, and it is on the X chromosomearrow_forwardIf a Mother's genotype is IAi and her Daughter's genotype is ii and the mother claims a man who is type B as the father... a) Is that possible? Explain. b) The accused man can prove that both of his parents are type AB. Is it possible for him to be type B? If so, what is his genotype? Explain. d) Does the answer in part c change the answer in part b? Explain.arrow_forward
- Why is there no trait (letter) on the y chromosome for males in this pedigree? A. Because the trait is X-linked (on the X chromosome) B. Because Ms. Premo made a mistake C. Because we never write anything on the y chromosomearrow_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_forwardHow can the order of three linked genes (A, B, and C) on the same chromosome be determined? A. Calculating the frequency of recombination between genes. B. Gene order cannot be determined by looking at the results of a cross. C. Look for parental phenotypes. D. Look for single-crossover phenotypes involving the wild-type and mutant alleles of genes A, B, and C.arrow_forward
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