Which of the following could be a test cross? a) AaBB X aabB b) AABB X...
Which of the following could be a test cross? a) AaBB X aabB b) AABB X aAbb c) A?B? X aadd d) ???? X aabb e) all of the above
Homework Answers
Test cross means crossing the organism of interest (it may have any genotype) with complete homozygous recessive individual. Example crossing Aabb with aabb.
Test cross is done to determine the genotype of the organism of interest. Hence ans is option D, ???? X aabb.
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Which of the following could be a test cross? a) AaBB X aabB b)
AABB X...
In a test-cross between an individual who is AaBb, and an individual who is aabb, the...
In a test-cross between an individual who is AaBb, and an individual who is aabb, the following types and numbers of offspring were obtained: 22 AaBb 67 Aabb 70 aaBb 21 aabb Which of the following is true? a. The A and B genes are linked to each other, and are 43 cM apart. b. The recombinant gametes from the double heterozygote are Ab and aB c. The A and B alleles in the AaBb parent are present in repulsion d....
1) Which of the following genotypes is homozygous: a) AaBB c) aaBb b) AABb d) aabb...
1) Which of the following genotypes is homozygous: a) AaBB c) aaBb b) AABb d) aabb 2) ith A locus is: a) a recessive gene b) an unmatched allele c) the location of a gene on a chromosome d) holds two sister chromatids toghether Which of the following would represent a heterozygous genotype: a) Bb c) bb b) BB d) AA 3) 마. g 4) If a dog displays a recessive phenotype it genotype must be: a) either TT or...
12. Imagine a cross between AaBb x aabb produces progeny in the following proportions: | AaBb...
12. Imagine a cross between AaBb x aabb produces progeny in the following proportions: | AaBb 31 aabb | 33. Aabb | 12 aaBb] 13 Based on this information, are genes A and B linked, or do they assort independently (Chi-square test)? IF linked, what is the genetic distance between A and B? Are gene A and B in coupling (cis) or repulsion (trans) conformation in the AaBb parent? How can you tell?
In a cross between AABB x aabb, the ratio of F2 genotypes between AABB, AaBB, Aabb...
In a cross between AABB x aabb, the ratio of F2 genotypes between AABB, AaBB, Aabb and aabb would be (a) 9 : 3 : 3 : 1 (b) 2 : 1 : 1 : 2 (c) 1 : 2 : 2 : 1 (d) 7 : 5 : 3 : 1.
assume that a cross is made between AaBb and aabb plants and all of the offspring...
assume that a cross is made between AaBb and aabb plants and all of the offspring are either AaBb or aabb. these results are consistent with the following circumstances: a. absolute linkage in cis for genes A and B, b. absolute linkage in trans for genes A and B c. independent assortment d. linkage with recombination for genes A and B e. sex linkage
You obtained F1 from a cross of AABB X aabb. F1 produced the following number of...
You obtained F1 from a cross of AABB X aabb. F1 produced the following number of gametes AB: 36 ab: 28 Ab: 14 aB: 18 To test whether A and B gens are linked or not, calculate chi-square value. Please work out and explain each step!
Prophese tolmeiosis At any time throughout division Question 4 A test cross of AaBb x aabb...
Prophese tolmeiosis At any time throughout division Question 4 A test cross of AaBb x aabb yields the following babies: 35% babies with AB phenotype 35% babies with ab phenotype 15% babies with Ab phenotype 15% babies with a phenotype Which of the following conclusions is correct? The A and genes are located on different chromosomes The A and B genes are located 70 map units apart on the same chromosome The Aand geves are located 35 map units apart...
explain why a is the answer 8. In the dihybrid cross AaBb x aabb, how many...
explain why a is the answer
8. In the dihybrid cross AaBb x aabb, how many homozygotes are found among the Fi offspring? Marge One Two Three d) Four e) Five
Which of the following is a testcross? Aabb aaBB AaBb AABB aabb AaBB AaBb aabb Mendel...
Which of the following is a testcross? Aabb aaBB AaBb AABB aabb AaBB AaBb aabb Mendel recognized that members of different gene pairs assort independently. This means that traits that appear together in the parental generation usually appear together in the F_2 traits in the parents are seldom found together in subsequent generations the association of traits in the F_2 is a random combination of parental traits parental traits are unrelated to traits in subsequent generations A specific ratio of...
You test-cross plants you suspect to be AaBb dihybrids and look at 100 offspring, with the...
You test-cross plants you suspect to be AaBb dihybrids and look at 100 offspring, with the following results: Phenotype AB 22 Ab 28 ab 29 ab 21100 total (for the purposes of this quiz, do not combine parental and recombinant classes) You wish to test the hypothesis that the data are best explained as a dihybrid test cross AaBb x aabb. 1)For a chi-square test, what expected number would you use for the aB class? 2)Calculate the chi-square value for...
1) Which of the following genotypes is homozygous: a) AaBB c) aaBb b) AABb d) aabb 2) ith A locus is: a) a recessive gene b) an unmatched allele c) the location of a gene on a chromosome d) holds two sister chromatids toghether Which of the following would represent a heterozygous genotype: a) Bb c) bb b) BB d) AA 3) 마. g 4) If a dog displays a recessive phenotype it genotype must be: a) either TT or...
12. Imagine a cross between AaBb x aabb produces progeny in the following proportions: | AaBb 31 aabb | 33. Aabb | 12 aaBb] 13 Based on this information, are genes A and B linked, or do they assort independently (Chi-square test)? IF linked, what is the genetic distance between A and B? Are gene A and B in coupling (cis) or repulsion (trans) conformation in the AaBb parent? How can you tell?
Prophese tolmeiosis At any time throughout division Question 4 A test cross of AaBb x aabb yields the following babies: 35% babies with AB phenotype 35% babies with ab phenotype 15% babies with Ab phenotype 15% babies with a phenotype Which of the following conclusions is correct? The A and genes are located on different chromosomes The A and B genes are located 70 map units apart on the same chromosome The Aand geves are located 35 map units apart...
explain why a is the answer
8. In the dihybrid cross AaBb x aabb, how many homozygotes are found among the Fi offspring? Marge One Two Three d) Four e) Five
Which of the following is a testcross? Aabb aaBB AaBb AABB aabb AaBB AaBb aabb Mendel recognized that members of different gene pairs assort independently. This means that traits that appear together in the parental generation usually appear together in the F_2 traits in the parents are seldom found together in subsequent generations the association of traits in the F_2 is a random combination of parental traits parental traits are unrelated to traits in subsequent generations A specific ratio of...
You test-cross plants you suspect to be AaBb dihybrids and look at 100 offspring, with the following results: Phenotype AB 22 Ab 28 ab 29 ab 21100 total (for the purposes of this quiz, do not combine parental and recombinant classes) You wish to test the hypothesis that the data are best explained as a dihybrid test cross AaBb x aabb. 1)For a chi-square test, what expected number would you use for the aB class? 2)Calculate the chi-square value for...
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