Which of the following statements accurately represents the difference between a gene and a locus? a. A gene is dominant, and a locus is recessive. b. A locus and a gene are essentially the same - there is no difference. c. A locus occurs in diploid cells, and a gene occurs in a haploid cell. d. A locus is a phenotype and a gene is a genotype.

Which of the following best describes Klinefelter syndrome?   A. It is an example of aneuploidy.   B. Affected individuals are males with low fertility.   C. Only one X chromosome is active in these individuals.   D. All of the above.

n fruit flies, eye color is a sex-linked trait, and red eyes (the wild-type variant) are dominant to white eyes (the mutant variant denoted by the letter W). A white-eyed, male fruit fly is observed in the laboratory. The genotype of this fly is _________, which is best described as being __________.   a. X+Y+; heterozygous   b. XWYW; hemizygous   c. XWY; homozygous recessive   d. X+YW; homozygous dominant   e. XWY; hemizygous

The recombinant offspring of the F2 generation were produced bycrossing over that occurreda. during spermatogenesis in the P generation males.b. during oogenesis in the P generation females.c. during spermatogenesis in the F1 males.d. during oogenesis in the F1 females. [Answer the multiple-choice questions based on the following experiment:P generation: True-breeding flies with red eyes and long wings werecrossed to flies with white eyes and miniature wings. All F1 offspringhad red eyes and long wings.The F1 female flies were then crossed to males with white eyes and miniaturewings. The following results were obtained for the F2 generation:129 red eyes, long wings133 white eyes, miniature wings71 red eyes, miniature wings67 white eyes, long wings]

A common farming practices is to breed a female horse with a male donkey. The result is a very robust animal-the mule. Most mules however are sterile, and therefore cannot produce. Are horses and donkeys member of the same species?

Sex determination in birds is different from that in humans. The sex chromosomes in birds are called Z and W, because males have two of the same chromosome (ZZ), whereas females have two different chromosomes (ZW). There is a Z-linked allele in some birds that causes the death of the embryo when the normal dominant allele is not present. What would be the sex ratio in the living offspring of a cross between a male heterozygous for the lethal allele and a normal female? A) What are the genotypes of the parents? Male____ Female____ B)  Which gametes would each form? Male____ Female____   C) Draw your Punnett square below and determine the sex ratios of living offspring.

no need to explain just need n=to know if it a.b.c and d. 1.) In a species of dog, a mutant gene that causes deafness is found on the Y chromosome. What type of offspring will be produced between a cross of male dog whose father is deaf, and female dog whose father is not deaf? a.) 25% normal female dogs, 25 % deaf female dogs, 25 % normal male dogs, 25 % deaf male dogs b.) 50% normal female dogs, 50 % deaf male dogs c.) 50% deaf female dogs, 50 % deaf male dogs d.) 50% normal female dogs, 25 % deaf male dogs, 25% normal male dogs 2.) Mendel crossed true breeding plants that had yellow pods with true breeding plants that had green pods. Yellow pod colour (Y) is dominant over green pod colour (y). Predict the genotypes and phenotypes of F1 generation. a.) yellow pods with genotype yy b.) yellow pods with genotype Yy c.) green pods with genotype Yy d.) green pods with genotype Yy

When chromosomes are inherited from one generation to the next, they are inherited...   A. Randomly, such that you might generate a gamete with chromosome 1 from your mother and chromosome 2 from your father   B. Together, such that you are likely to generate gametes containing chromosomes from either your mother or your father   C. Both A and B   D. None of the above

Assume that a disease called Disease B is known to be x-linked but we don’t know if it’s a dominant or recessive allele that causes it.  Looking at how common this disease is in males and females would give us the answer.  How?

Which of the following statements is FALSE? Inactivation of one of the two X chromosomes in the somatic cells of mammalian females..... a. underlies the Calico phenotype in cats. b. leads to cellular mosaicism in females heterozygous for an X-linked gene. c. affects 75 % of the paternal and 25 % of the maternal X-chromosomes of a mammalian body. d. leads to the formation of a Barr body in female cells' nuclei. e. is the mechanism in mammals to compensate for the higher dosage of X-linked genes in females as compared to males.