Campbell Biology: Concepts and Connections
10th Edition
ISBN: 9780135269169
Author: Taylor
Publisher: PEARSON
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Chapter 9, Problem 17TYK
SCIENTIFIC THINKING The breakthrough that led Bateson and Punnett to recognize the existence of linked genes (Module 9.17) was the appearance of unexpected results after they crossed double heterozygous pea plants (PpLI) with each other. Imagine that you have a group of Labrador retrievers that are all heterozygous for both coat color and blindness (BbNn). If you used this group of dogs to produce 160 puppies, how many puppies of each
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Mendelian Genetics Punnett Square Question :
In cattle, the hornless condition (H) is dominant to that for the possession of horns (h).
a) A horned bull is mated to a hornless cow which is heterozygous . What kind of offspring are to be expected and in what ratio ?
b) If the cow is then mated to a hornless bull which is also heterozygous, what is the chance that the first calf will have horns ?
c) Assuming that the first calf has horns, what is the chance that the second calf will be hornless ?
Temales among these offspring are allowed to freely intermate, producing a flock of F, kittens. Predict
The males and
the phenotypic ratio for fur color among these many grandkittens.
In Drosophila (fruit flies), the wild type eye color, brick red, is actually produced by the deposition of
two pigments in the eyes, a dull brown pigment and a brilliant red pigment. These two pigments are
produced by the action of two different, non-allelic (and non-linked) genes. Each of these genes has two
alleles, a dominant one which causes normal the production of the pigment controlled by the gene, and a
recessive one which is defective, and causes none of that pigment to be produced. Thus, a normal eye-
color fruit fly must have at least one dominant allele for each of these genes.
If a fly is homozygous for the defective, recessive allele of the gene which produces the brown pigment,
that fly will have only the brilliant red pigment in its eyes. This condition is called "cinnabar." For this…
Chapter 9 Solutions
Campbell Biology: Concepts and Connections
Ch. 9 - Connecting the Concepts 1. Complete this concept...Ch. 9 - Whether an allele is dominant or recessive depends...Ch. 9 - Edward was found to be heterozygous (Ss) for...Ch. 9 - Two fruit flies with eyes of the usual red color...Ch. 9 - A man with type B blood and a woman who has type A...Ch. 9 - Tim and Jan both have freckles (see Module 9.9),...Ch. 9 - Both Tim and Jan (problem 6) have a widows peak...Ch. 9 - In rabbits, black hair depends on a dominant...Ch. 9 - A fruit fly with a gray body and red eyes...Ch. 9 - A series of matings shows that the recombination...
Ch. 9 - A couple are both phenotypically normal, but their...Ch. 9 - Why do more men than women have colorblindness?Ch. 9 - In fruit flies, the genes for wing shape and body...Ch. 9 - Adult height in humans is at least partially...Ch. 9 - Heather was surprised to discover she suffered...Ch. 9 - In 1981, a stray black cat with unusual rounded,...Ch. 9 - SCIENTIFIC THINKING The breakthrough that led...
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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
- Cultivated American cotton plants have a total of 52 chromosomes(2n = 52). In each cell there are 13 pairs of large chromosomesand 13 pairs of smaller chromosomes. Old World cotton plantshave 26 chromosomes (2n – 26); all large. Wild American cottonplants have 26 chromosomes; all small. 1)Propose a testable hypothesis to explain how cultivated American cotton probably originatedarrow_forwardNeed help with this questionarrow_forwardWhat was the hypothesis of the X-linked cross conducted in the lab (between white-eyed female and re-eyed male) with the white mutation in Drosophila and written up in your lab report? A All female offspring will inherit red eyes from their mother because the mutation is X linked recessi B All female offspring will inherit white eyes from their mother because the mutation is X linked recessive. C All male offspring will inherit white eyes from their mother because the mutation is X linked recessive. D All male offspring will inherit red eyes from their mother because the mutation is X linked recessive. E All male offspring will inherit white eyes from their mother because the mutation is X linked dominant.arrow_forward
- in a summary use your understanding of molecular biology to explain that recessive alleles are expressed through transcription and translation, and that they may have functional gene products. Describe how the interaction of the products produced by each allele results in what we see as dominant or recessive traits.arrow_forwardGenetics, Mating took place between males and females of a fruit fly, and individuals appeared With the following proportions and attributes: 25% Female flies with irregular wings and 25% female flies with irregular wings 25% male flies with irregular wings and 25% male flies with irregular wings . . If a symbol for the adjective of regular wings is symbolized by the symbol B and if a symbol for irregular wings with the symbol b, The genotypes of the parents are? 1. bB, Bb 2. bb,Bb 3. XB Y, Xb Xb 4. XbY, XBXbarrow_forwardPart 1 - With use of Punnett diagrams discuss how the results of experiments carried out by Austrian monk Gregor Mendel on pea plants brought about the Law of Dominance, the Law of Segregation, and the Law of Independent assortment. Part 2 - In humans, the gene that produces the disease Sickle Cell Anaemia is recessive to the gene for healthy haemoglobin production. a) How can two phenotypically healthy parents have a child who suffers from Sickle cell Anaemia? In your answer use suitable letters to show the genotypes of the parents and construct a Punnett diagram to show all the possibilities of the children's genotypes. b) Based on the outcome of your Punnett diagram, state and explain the probability of a child being a sufferer of Sickle Cell Anaemia and the probability of a child not suffering from the disease. c) If an individual who suffers from Sickle cell disease has a child with someone who is healthy (and not carrying the sickle cell gene), what is the probability that…arrow_forward
- Biologyarrow_forwardSuppose Jonathan breeds flowers and wants to optimize production of offspring with both short stems and white flowers, which are coded for by two genes with the recessive alleles t and p, respectively. In flowers, T codes for tall stems and P codes for purple flowers. Jonathan crosses two heterozygotes that produce 544544 offspring. How many of these 544544 offspring are predicted to have both short stems and white flowers? please help solve and please explain thank youarrow_forwardChoose one plsarrow_forward
- It would be nice if you can give me some explanation please Number 6arrow_forwardWould you simply answer the question for me, i saw many answers for it but still not sure. The flower color of genetically identical hemp plants (clones) is purple when the flowers develop under cold environment (30 °C). Describe in detail a molecular mechanism that could explain how these two groups of genetically identical plants differ in their gene expressions to produce different flower colors?arrow_forwardAre the genes that determine coat color and hair type assorting independently? Carry out chi-square tests to test your hypothesisarrow_forward
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