Individual 1 with phenotype T for tall is test crossed, and half the progeny hav
ID: 99242 • Letter: I
Question
Individual 1 with phenotype T for tall is test crossed, and half the progeny have phenotype tall T and the other half have phenotype t. What are the genotypes of the individuals that were crossed? A) TT and tt B) Tt and Tt C) TT and Tt D) Tt and tt A tall, purple flower plant with genotype Tt Pp is crossed with a tall, white flower plant of genotype Tt pp. What is the probability of obtaining progeny with genotype TTpp? A) 1/8 B) 1/4 C) 1/2 D) 2/3 E) 3/4 Mendel's law of segregation states which of the following? A) Traits are produced by an interaction between two pieces of information. B) Information is received equally from both parents. C) Only half of the hereditary information is passed to each offspring. D) Some traits are recessive. E) All of the above. In Mendel's dihybrid crosses, he would typically _____ the F_1 plants and see a phenotypic ratio of ____ in the F_2 generation of plants. A) cross-fertilize: 9: 3: 3: 1 B) self-fertilize: 16: 0 C) self-fertilize: 9: 3: 3: 1 D) cross-fertilize: 16: 0 E) self-fertilize: 3: 1 Mendel's approach to studying inheritance was effective because A) he had experimented several times with pea plants before so he was familiar with the organism. B) he was the first to use pea plants as the study subject for heredity experiments. C) the pea plant he chose to study was easy to cultivate. D) Mendel had already experimented with fruit flies and had some preliminary data. Which of the following statements is true about sexual reproduction? A) Each parent contributes a haploid gene set to offspring. B) Sexual reproduction occurs only in organisms with anatomically distinct sexes. C) Sexual reproduction involves the union of diploid gametes. D) Sexual reproduction produces a haploid zygote. If a color-blind female has children, what do we know about all of her sons? Half of the sons will be color blind.Explanation / Answer
Ans.
29) “A”
(In Mendel’s dihybrid cross, the F1 plant are self-fertilized and the phenotype ratio of the F2 generation is 9:3:3:1.)
30.) “C”
(The pea plant was easy to grow and also have ability of self pollination.)
31.) “A”
(Each parent contributes haploid set of gene (by the fusion of egg and sperm) to their progeny which has diploid gamete.)
32.) All of the son of a color blind mother would be color-blind.
(Color blindness is a X recessive linked trait hence son can succeed to color blindness from his mother’s color blindness allele.)