When Mendel performed di-hybrid crosses (i.e. pea color and pea shape) what did he find in the F2 generation? He found that traits were linked together, such that if an individual was homozygous recessive for 1 trait it would also be homozygous recessive for the other trait He found a set of intermediate phenotypes in the F1 and F2 generations for each trait He found one trait could return in 25% of the offspring but the other trait did not He found that each trait was inherited separately from the other trait, indicating that traits are randomly assorted

When Mendel performed di-hybrid crosses (i.e. pea color and pea shape) what did he find in the F2 generation? He found that traits were linked together, such that if an individual was homozygous recessive for 1 trait it would also be homozygous recessive for the other trait He found a set of intermediate phenotypes in the F1 and F2 generations for each trait He found one trait could return in 25% of the offspring but the other trait did not He found that each trait was inherited separately from the other trait, indicating that traits are randomly assorted

Name: When Mendel performed di-hybrid crosses (i.e. pea color and pea shape)
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Description: When Mendel performed di-hybrid crosses (i.e. pea color and pea shape) what did he find in the F2 generation? He found that traits were linked together, such that if an individual was homozygous recessive for 1 trait it would also be homozygous rece

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter13: Patterns In Inherited Traits

Section: Chapter Questions

Problem 6GP: In sweet pea plant, an allele for purple flowers (P) is dominant when paired with a recessive allele...

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When Mendel performed mono-hybrid crosses with opposing traits (i.e. purple flowers and white flowers) what did he see in the in F2 generation? He found that the trait that had dissappeared in the F1 generation returned in 25% of the F2 generation He found that both traits continued to be present in 50% of the F2 generation, just like the F1 generation He found that the trait that had dissappeared in the F1 generation returned in 50% of the F2 generation He found that the trait that had dissappeared in the F1 generation returned in 75% of the F2 generation
Considering the Mendelian traits tall (D) versus dwarf (d) and violet (W) versus white (w), consider the crosses below and determine the genotypes of the parental plants by analyzing the phenotypes of the offspring. Parental Plants Offspring tall, violet x tall, white 3/8 tall, white 3/8 tall, violet 1/8 dwarf, violet 1/8 dwarf, white Select the one best answer. DDWW x DDww DdWw x Ddww DDWW x Ddww DDWw x DdWw DdWw x ddWw
As you know Mendel’s main contribution to genetics was his proposing a model of particulate inheritance. This discovery contradicted the widely held belief that blending inheritance was the true theory that explained hereditary traits. One advantage that Mendel had in choosing garden peas (Pisum sativum) was that he could either allow the pea flowers on a plant to self-pollinate or he could deliberately cross-pollinate the flowers. For his single locus crosses of pure-breeding lines, he would take the F2 offspring of the dominant phenotype (such as yellow seeds) and ensure that each yellow-seeded plant would self-pollinate. He was able to show that 1/3 of all the yellow-seeded plants in this generation bred true while the other 2/3 of the yellow seeded plants showed segregation. Do you believe that this extra experiment gave additional important evidence for the particulate theory of inheritance or did the offspring from the F1 x F1 cross provide enough evidence of Mendel’s First Law?…
Examine the following crosses carried out to explore inheritance of traits in pea plants. Parent cross: rough, soft peas X smooth, hard peas F1 : all rough, hard Test cross: rough, hard X smooth, soft peas F2 : 115 rough soft, 110 smooth hard, 8 rough hard, 12 smooth soft Identify which traits are dominant, and either support or refute the hypothesis that the traits rough/smooth and soft/hard assort independently according to Mendel's law.
24) When mendel performed mono-hybrid crosses with opposing traits (i.e. purple and white flowers), what did he find in the F1 generation? He found an intermediate phenotype that had not been seen before in all of the F1 generation He found that one of the traits was absent from the F1 generation He found that one of the traits was only present in 25% of the F1 generation He found that each trait was found in 50% of the F1 generation
Do the data that Mendel obtained fit his hypotheses?For example, Mendel obtained 315 yellow round, 101yellow wrinkled, 108 green round, and 32 greenwrinkled seeds from the selfing of Yy Rr individuals(a total of 556). His hypotheses of segregation andindependent assortment predict a 9:3:3:1 ratio in thiscase. Use the chi-square test to determine whetherMendel’s data are significantly different from whathe predicted. (The chi-square test did not exist inMendel’s day, so he was not able to test his own datafor goodness of fit to his hypotheses.)
Mendel began his work with pairs of varieties from the breeders that differed from each other in just one trait (corresponding to one gene difference, as we now know) out of the 7 traits he studied. These pairs could be obtained by self-pollinating an individual from an advanced generation that was pure-breeding for 6 of the traits but heterozygous for the 7th. i. What is the probability of finding an example plant in the F10 generation? ii. What is the probability of finding an example plant in the F4 generation? [Note: this probability is higher than that for the F10 generation or the F3 generation. What qualitative reason might there be?
In which type of cross(es) can we apply and demonstrate the law of segregation and law of independent assortment? Why can’t we apply the 2 Mendelian laws on monohybrid crosses? Explain briefly. How can one use a pedigree chart to hypothesize how a certain condition is transmitted? Can a pedigree chart show probability of occurrence more accurately than the Punnett square? Why or why not?
Using the concepts of non-mendelian genetics, what is the phenotypic ratio of the offspring if two heterozygous pea plants with purple flowers are crossed together? O 3 pea plants with light purple flowers: 1 pea plant with a single mixed color for white and purple color. O 3 pea plants with purple flowers: 1 pea plant with light violet flowers. O 1 pea plant with purple flowers: 2 pea plants with white flowers: 1 pea plant with mixed color for white and purple color. O 1 pea plant with purple flowers: 2 pea plants with light purple flowers: 1: pea plant with white flowers.
In a study of black guinea pigs and white guinea pigs, 100 black animals were crossed with 100 white animals, and each cross was carried to an F2 generation. In 94 of the crosses, all the F1 offspring were black and an F2 ratio of 3 black:1 white was obtained. In the other 6 cases, half of the F1 animals were black and the other half were white. Why? Predict the results of crossing the black and white F1 guinea pigs from the 6 exceptional cases.
You are studying a new allele of the yellow gene in pea plants (the gene that in Mendel’s experiments gave green peas with the yy allele combination). You refer to this new allele as y2. When you look at y2y2 homozygotes, you find that 80% of the peas are some shade of green and of these green peas 50% of them are the same full green shade as Mendel’s original yy allele and 50% of them are a shade that is halfway between yellow and green. Discuss these properties in terms of expressivity and penetrance.”
In this program, you are provided with phenotype pair counts of F2 offspring at two research institutes. The key different between this work and previous work is that now we consider two genes instead of one. The phenotype pairs are the (shape, color) of peas from a pea plant. It turns out that there are two separate genes that code for these phenotypes. We shall call them Shape and Color. Gregor Mendel originally recorded these experiments in green peas. Using the notation: R = Round (dominant) allele at Shape gene; r = Wrinkled (recessive) allele at Shape gene; Y = Yellow (dominant) allele at Color gene; y = Green (recessive) allele at Color gene; then the shape and color of any pea can be determined by studying the genotypes at each gene. It turns out that, when one mates a plant that is homozygous for the dominant alleles (RRYY) with a plant that is homozygous for the recessive alleles (rryy), the F1 generation are heterozygous at both genes, as with a single gene disorder.…

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		He found that traits were linked together, such that if an individual was homozygous recessive for 1 trait it would also be homozygous recessive for the other trait
		He found a set of intermediate phenotypes in the F1 and F2 generations for each trait
		He found one trait could return in 25% of the offspring but the other trait did not
		He found that each trait was inherited separately from the other trait, indicating that traits are randomly assorted