* Site-Outage Notice: Our engineering elves will be tweaking the Shmoop site from Monday, December 22 10:00 PM PST to Tuesday, December 23 5:00 AM PST. The site will be unavailable during this time.
Dismiss
© 2014 Shmoop University, Inc. All rights reserved.
Genetics

Genetics

Genetics: Virtual Zygosity (What's a Jamiroquai?) True or False

1. A dominant allele determines a phenotype when present in -> a homozygous individual
2. A haploid individual -> carries only recessive alleles
3. If two genes are NOT linked, how likely are they to be inherited together? -> 50%
4. You identify a single gene affecting three different phenotypes. What is this gene an example of? -> Pleiotropy
5. If a trait is 100% penetrant, it means that -> there is no variation in the trait
6. Examine carefully the pedigree below. Based on the inheritance pattern of this condition, where might its genetic cause reside?

[IMAGE]

Remember, in pedigrees, men are represented with a square and women with a circle. Roman numerals define generations (I, II, and III), and Arabic numerals (1, 2, and 3) define birth order within each generation. Here, someone carrying the condition has either a filled square or circle. -> Mitochondria

7. When the expression of one gene modifies the expression of a different gene, it is known as -> epistasis
8. Which of the following statements about mutant alleles is incorrect? -> A mutant allele is always recessive.
9. If a true breeding chinchilla rabbit is crossed with a true breeding Himalayan rabbit, all the offspring are chinchilla. What does this information tell you about the relationship between the chinchilla and Himalayan alleles? -> Himalayan is recessive to chinchilla.
10. If the phenotypic ratio of offspring from a cross between a Himalayan rabbit and a chinchilla rabbit is 2 chinchilla : 1 Himalayan: 1 albino, what were the genotypes of the parents? -> cchcch × chch

Submit
Advertisement
Noodle's College Search
Advertisement
Advertisement
Advertisement