Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Predict the genotypic and phenotypic ratios among the progeny of complex multi-hybrid crosses using simple rules of probability?
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- What is the phenotypic ratio of the offspring of heterozygous parents in a dihybrid cross?arrow_forwardIn a mendelian monohbrid cross which generation is always completely heterozygous?arrow_forwardWhich of the following statements are true regarding Mendel's observations of single factor crosses? All F2 offspring exhibit the dominant phenotype 3/4 of F1 offspring exhibit the dominant phenotype 3/4 of F2 offspring exhibit the dominant phenotype The segregation of alleles into the gametes of F1 offspring determines the ratio of phenotypes observed in the F2. The independent assortment of alleles into the gametes of F1 offspring determines the ratio of phenotypes observed in the F2. All F1 offspring exhibit the dominant phenotypearrow_forward
- The M allele encodes a nonfunctioning protein that will lead to death in a homozygous individual. What genotypic ratio would you expect to observe in the living offspring of the following cross: Mm x Mm? a) 2 Mm: 1 mm b) 1 Mm : 1 mm c) 1 MM : 2 Mm : 1 mmarrow_forwardIn terms of a chi-square analysis, what ratio would be tested for the offspring of a monohybrid cross involving a pure-breeding dominant condition mated with a pure-breeding recessive condition?arrow_forwardIn tomatoes, a heterozygous plant with normal fruit and purple stems is crossed with a recessive plant having fasciated fruit and green stems (test cross). The following distribution of offspring is observed: normal fruit, purple stems 38.5% fasciated fruit, green stems 38.5% normal fruit, green stems 11.5% fasciated fruit, purple stems 11.5% What is the recombination frequency?arrow_forward
- A cross is made between AaBbCc and aabbcc plants, and the offspring occur in the following numbers: 30 aaBbCc 15 aaBbcc 30 aabbCc 15 aabbcc 15 AaBbCc 30 AaBbcc 15 AabbCc 30 Aabbcc What is the arrangement of alleles on the homologous chromosomes of the heterozygous parent? Include map units.arrow_forwardA plant with the genotype AAbb was crossed with one with the genotype aaBB. The F1 plants were testcrossed. If the genes are not linked, the expected genotypic ratio in the offspring of this testcross would be?arrow_forwardThe genes for tall vine, D, and yellow seeds, G, are dominant over their respective alleles for dwarf, d, and green, g. What phenotypes and genotypes are expected from each of the following crosses? Include phenotypic and genotypic ratios. 6. a) heterozygous tall, homozygous yellow x homozygous tall, heterozygous yellow b) dwarf, heterozygous yellow x heterozygous tall, green c) homozygous tall, homozygous yellow x heterozygous tall, green d) heterozygous tall, heterozygous yellow x heterozygous tall, heterozygous yellowarrow_forward
- a) how many degree of freedom b) what is the chi square value c) what is the percentage assurance d) is your data a good fit for the ration you expected. Previous question asks in pea plants stem length is either long dominant or short recessive. 2 heterozygous long pea plants were crossed. The progeny included 402 pea plants, 308 of which were long and 94 of which were short. The ratio is 3:1arrow_forwardGiven the cross AaBbCc x Aabbcc, what is the probability of obtaining an offspring with the genotype aabbCc?arrow_forwardFeather color in budgies (parakeets) is determined by two different genes, Y and B. YYBB, YYBB, or YYBB is green; yyBB or yyBb is blue; YYbb or Yybb is yellow; and yybb is white. Two blue budgies were crossed. Over the years they produced 22 offspring, 5 of them were white. What are the most likely genotypes of the two parents? Multiple Choice Both were yyBB One is yyBb and the other is yybb Both were YYBB Both were yyBb One is yyBB and the other is yyBbarrow_forward
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