Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 13, Problem 9RQ
In agriculture, polyploid crops (like coffee, strawberries, or bananas) tend to produce
- more uniformity
- more variety
- larger yields
- smaller yields
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Let's say that you were a farmer and you have a field of peas of various genotypes. Pretend that you only want to produce wrinkled peas. What would you do with your current plants to ensure that the next generation is mostly wrinkled peas? (You can't buy different plants; work with what you have.)
Show the cross between a plant which is tall and purple, heterozygous for both traits AND a plant which is short and purple; heterozygous for purple flowers. Use the dihybrid template printout from above for this cross. Insert your picture by clicking on the picture frame and ensure that your picture includes your name.
A wrinkle-seeded plant (rr) is crossed with round-seeded (Rr).
Chapter 13 Solutions
Biology 2e
Ch. 13 - Figure 13.3 In a test cross for two...Ch. 13 - Figure 13.4 Which of the following statements is...Ch. 13 - Figure 13.6 Which of the following statements...Ch. 13 - X-linked recessive traits in humans (or in...Ch. 13 - The first suggestion that chromosomes may...Ch. 13 - Which recombination frequency corresponds to...Ch. 13 - Which recombination frequency corresponds to...Ch. 13 - Which of the following codes describes position 12...Ch. 13 - In agriculture, polyploid crops (like coffee,...Ch. 13 - Assume a pericentric inversion occurred in one of...
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- In agriculture, an advantage of triploidy in plants is that the plants area. more fertile.b. often seedless.c. always disease-resistant.d. all of the above.arrow_forwardPea plants were a good model organism for Mendel because A -they had large flowers and were easy to manipulate b -there were many contrasting traits c -both a and b d- none of the abovearrow_forwardCultivated 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_forward
- What is the genotype of pure - breed round seeds ?. a .Rryy b . Rr c. Rrry d. RRarrow_forwardBackground: Each kernel on a cob of corn is a seed for a corn plant. Each kernel can be planted and a whole new corn plant can grow from this kernel. Each cob of corn has hundreds of kernels which were each created by the fertilization of hundreds of eggs from one corn plant and hundreds of pollen from another corn plant. Corn cobs allow for easy genetic analysis because looking at a corn cob is like looking at the hundreds of offspring created from two parents. Corn kernels can come in different colours and textures. It has been determined that purple (P) corn kernels are dominant to yellow (p) corn kernels. Smooth (M) kernels are dominant to shrunken (m) kernels. Purpose: With the use of chi-square analysis, determine if one should accept or reject the hypothesis that both parents that created a cob of corn were heterozygous for colour and heterozygous for texture (PpMm X PpMm). Apparatus & Method: Create a dihybrid cross and determine the expected phenotypic…arrow_forwardGenetics : Pisatin is a chemical used for defense by Pisum sativum against parasitic fungi (thus resistant). Two susceptible pure (homozygous) lines of peas were obtained and used in the following crosses:arrow_forward
- Which of the salt-marsh grasses in Figure is a polyploid?a. Spartina maritimab. Spartina alterniflorac. Hybrid between Spartina maritima and Spartina alterniflorad. Spartina anglicae. Both c and darrow_forwardThe following pedigree traces the inheritance of a certain genetic disease in a family. The circles represent women and the squares represent men. Individuals with darkened shapes have the disease, while individuals with white shapes do not. The lines indicate the relationship between individuals, either through marriage or by birth. Study the chart and then answer the question. How many women have the disease in this pedigree? Five One Fourarrow_forwardA heterozygote has _____. a. only one of the various forms of a gene b. a pair of identical alleles c. a pair of contrasting alleles d. a haploid condition, in genetic termsarrow_forward
- More Crosses with Pea Plants: The Principle of Independent Assortment Consider the following cross: P1: AABBCCDDEE aabbccddee F1: AaBbCcDdEe (self-cross to get F2) What is the chance of getting an AaBBccDdee individual in the F2 generation?arrow_forwardPea plants have seven different types of chromosomes. A chromosome with a centromere at the very end is called a. submetacentric. b. acentric. c. acrocentric. d. metacentric. e. telocentric.arrow_forwarda) You are studying cushion plants in New Zealand: the wild-type cushion plan has a wide canopy. You obtain eight cushion plants that all have narrow canopies caused by a single autosomal recessive mutation. To determine how many genes are defined by these mutations, you mate the plants together and get the results shown in the complementation table below. The “–“ represents plants with narrow canopies and the “+” represents wide canopies. What will the offspring of a cross between plants A and F look like? b) Based on the above, how many different genes are defined by the 8 mutant strains?arrow_forward
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