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

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1.	A dominant allele determines a phenotype when present in -> a homozygous individual True False
2.	A haploid individual -> carries only recessive alleles True False
3.	If two genes are NOT linked, how likely are they to be inherited together? -> 50% True False
4.	You identify a single gene affecting three different phenotypes. What is this gene an example of? -> Pleiotropy True False
5.	If a trait is 100% penetrant, it means that -> there is no variation in the trait True False
6.	Examine carefully the pedigree below. Based on the inheritance pattern of this condition, where might its genetic cause reside? 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 True False
7.	When the expression of one gene modifies the expression of a different gene, it is known as -> epistasis True False
8.	Which of the following statements about mutant alleles is incorrect? -> A mutant allele is always recessive. True False
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. True False
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? -> c^chc^ch × c^hc^h True False

Genetics True or False

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