B250WT3S05 - BIL 250/P Exam 3 (4/19/05) Student Name:...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
BIL 250/P Exam 3 (4/19/05) Student Name: Student ID#: 1. The cross GE/ge X ge/ge produces the following progeny, GE/ge 404; ge/ge 396; gE/ge 97; Ge/ge 103. From these data, how many map units one can conclude between the G and E loci. A. 10 B. 40 C. 80 D. 20 E. 30 Answer: D 2. While the most frequent forms of Down syndrome are caused by a random error, nondisjunction of chromosome #21, Down syndrome occasionally runs in families. The cause of this form of familial Down syndrome is _____________. A. a translocation between chromosome #21 and #14. B. a chromosomal aberration involving chromosome #1 C. too many X chromosomes D. a translocation between chromosome #21 and a member of the C chromosome group E. a maternal age effect Answer: A 3. A genomic condition which may be responsible for some forms of fragile-X syndrome as well as Huntington disease involves A. F plasmids inserted into the FMR -1 gene. B. various lengths of trinucleotide repeats. C. multiple breakpoints fairly evenly dispersed along the X chromosome. D. multiple inversions in the X chromosome. E. single translocations in the X chromosome. Answer: B 4. Assume a species has a diploid chromosome number of 24. The term applied to an individual with 25 chromosomes would be triploid. A. True B. False Answer: B 5. Direction of shell coiling in the snail, Limnaea peregra , is conditioned by a form of inheritance known as A. sex-linked inheritance. B. heteroplasmy. C. maternal effect. D. independent assortment. E. epistasis. Answer: C 6. One explanation for organelle inheritance is that
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
A. mitochondria and chloroplasts lack DNA and are therefore dependent on the maternal cytoplasmic contributions. B. mitochondria and chloroplasts have DNA which is subject to mutation. C. organelles such as mitochondria are always "wild type." D. chloroplasts, for example, are completely dependent on the nuclear genome for components. E. none of the above. Answer: B 7. Mitochondrial mutations are passed equally to offspring by both males and females. A. True B. False Answer: B 8. It is safe to say that a maternal effect is caused by the genotype, not the phenotype, of the parent producing the egg. A. True
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 10/27/2011 for the course BIL 250 at University of Miami.

Page1 / 7

B250WT3S05 - BIL 250/P Exam 3 (4/19/05) Student Name:...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online