Concept explainers
Determine whether the statements below are true or false. If a statement is false, provide the correct information or revise the statement to make it correct.
a. If a dihybrid cross is performed, the expected genotypic ratio is
b. A student uses the product rule to predict that the probability of flipping a coin twice and getting a head and then a tail is
c. A test cross between a heterozygous parent and a homozygous recessive parent is expected to produce a 1:1 genotypic and phenotypic ratio.
d. The outcome of a trihybrid cross is predicted by the law of segregation.
e. Reciprocal crosses that produce identical results demonstrate that a strain is pure-breeding.
f. If a woman is heterozygous for albinism, an autosomal recessive condition that results in the absence of skin pigment, the proportion of her gametes carrying the allele that allows pigment expression is expected to be 75%.
g. The progeny of a trihybrid cross are expected to have one of 27 different genotypes.
h. If a dihybrid F1 plant is self-fertilized,
(1)
(2)
(3)
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Genetic Analysis: An Integrated Approach (3rd Edition)
- Match the terms with the best description. ___ dihybrid cross a. bb ___ monohybrid cross b. AaBbAaBb ___ homozygous condition c. Aa ___ heterozygous condition d. AaAaarrow_forwardComplete the Punnett Squares for each of the following crosses and fill out the possible % for the offspring. 10. If the woman is type AB and the father is heterozygous for type B. % AB % A % Barrow_forwardState the name of the analysis/ chart and explain in at least one sentence. Question #2 Which of Mendel's postulates can only be demonstrated in crosses involving at least two pairs of traits? State the postulate and explain in at least one sentence. D. Focus Question #3arrow_forward
- DIHYBRID CROSS Heterozygous Yellow and heterozygous round seed crossed with homozygous yellow and heterozygous round seed. Find the following: 1. Alleles of both parents (given problems) 2. Genotype 3. Phenotype ratio 4. Write the punnet square -Please answer this on the paper and explain the answer step by step. Thank you asaparrow_forwardWidow peak (H) is dominant to a straight hairline (h), and long eyelashes (E) are dominant to short (e). d. A homozygous widow peak man who is heterozygous for eyelashes mates with a straight hairline homozygous for long eyelashes woman. Genotype: A a Bb Complete the punnett square on the next page with this information. i. Use FOIL to determine the possible gametes and then create a dihybrid cross for this mating. Foil Method: A a B b O Gametes: AB Ab aB ab Example of how to write ratios. Ratios of possible phenotypes of offspring FOIL (mom) FOIL (dad) 2 tall: 2 short 2 HH: 2 hharrow_forwardIf these two individuals with the following characteristics are crossed Parent 1: blood type AB; heterozygous for H gene Parent 2: heterozygous B blood type; hh genotype What is the phenotypic ratio (blood type) of the F, generation? A. 4 AB: 1 A: 1 B: 2 0 B. 2 AB: 2 A: 4 B: no O C. 1 AB: 1 A: 2 B: 4 0 D. 1 AB: 1 A: 1 B: 10arrow_forward
- A. heterozygous blue-eyed man is marrying a homozygous brown-ayed woman. Determine the ratio of the following from the offspring. B. Genotype C. Phenotypearrow_forwardGive typing answer with explanation and conclusion "B"-yellow "b"-green. When 2 heterozygous parents for both traits are crossed it's called a dihybrid cross- AaBb × AaBb. Fill in the Punnett Square with the genotypes of this cross.arrow_forwardAn individual whose genotype is AABbCc is crossed with an individual who is heterozygous for all three of these genes. List the gametes that the AABbCc parent could produce. Perform the Fork-lined method of the given alleles. A male having a characteristic of TtSsYy and a female TTSsYY .arrow_forward
- The genes for tall vine D and yellow seed G, are dominant over their respective alleles for dwarf d and green g. What phenotypes are expected from each of the following crosses? Include phenotypic and genotypic ratio. Use Punnet square to show the ff. Crosses. a. Heterozygous tall, homozygous yellow X Homozygous Tall, heterozygous yellow. b. Homozygous Dwarf, heterozygous yellow X Heterozygous tall, homozygous greenarrow_forwardPetunia flower color is governed by two alleles, but neither allele is truly dominant over the other. Petunias with the genotype RR are red-flowered, those that are heterozygous (RW) are pink, while those with the (WW) genotype have white flowers. This is an example of incomplete dominance. a. If a white-flowered plant is crossed with a red-flowered plant, what is the genotypic ratio of the F1. b. What is the phenotypic ratio of the F1. c. If two of the F1 offspring were crossed, what phenotypes would appear in the F2?. d. What would be the genotypic ratio in the F2 generation?arrow_forwarduse the results in the graph/table to answer the following questions Let L = wildtype (long) wings and l = short wings.For the F1 generation cross1. Identify the genotype of each parent 2. Create a Punnett square to explain your results 3. Write the genotypic and phenotypic ratiosarrow_forward