Mendelian Genetics Questions With 100% Correct Answers.

A cross between true-breeding green and yellow plants (green pea color is dominant) results in ... plants with 1/4 green peas, 3/4 yellow peas plants with all yellow peas plants with 1/4 yellow peas, 3/4 green peas plants with all green peas - Answer-plants with all green peas A dihybrid cross (AaBb x AaBb) will result in what offspring ratio? 4:4:2:2 1:3:1 3:1 9:3:3:1 - Answer-9:3:3:1 A individual who has two of the same allele is said to be homozygous heteromologous homologous heterozygous diplozygous - Answer-homozygous A modified Mendelian ratio is represented by 9:3:3:1 1:3:13:1 9:7 1:1 - Answer-9:7 A plant that has purple flowers is crossed with one that has white flowers. The offspring were half white and half purple. What were the genotypes of the parents? Pp x pp Pp x Pp PP x pp PP x WW - Answer-Pp x pp Advantages to using the garden pea for Mendel's experiments included all listed below except true-breeding varieties were scarce. he could expect to observe segregation of traits among the offspring. they have relatively short generation time. sex organs of the pea are enclosed within the flower. - Answer-true-breeding varieties were scarce. An organism that has two different alleles for a single trait is said to be _____ for that trait. haploid heterozygous homozygous polyploid - Answer-heterozygous An organism's expressed physical traits, such as hair color or shape, are called its ____ . genotypeallele phenotype gamete - Answer-phenotype Compared to previous geneticists, the unique characteristic of Mendel's work was keeping records of numbers of different progeny choosing the garden pea for his experiment producing hybrids studying more than one generation crossing true-breeding plants - Answer-keeping records of numbers of different progeny Epistasis is a genetic condition in which certain alleles of one locus can alter the expression of alleles of a different locus. True False - Answer-True Hypertrichosis, hairiness of the pinna of the ear, is inherited as a Y-linked recessive in humans. If a man with hypertrichosis marries a normal woman, what types of children may they have? All of their children of both sexes have hypertrichosis. All the sons have hypertrichosis, but none of their daughters. Half of their sons, but none of their daughters will have hypertrichosis. All the daughters have hypertrichosis, but none of their sons. None of their children have hypertrichosis. - Answer-All the sons have hypertrichosis, but none of their daughters. If a man has blood type O and his wife has blood type AB, what blood types are possible among their children?A only B only A and B O only - Answer-A and B