University:
Campbell University
Course:
BIOL 342 | Genetics
Academic year:

2020
Views:

117

Pages:

4
Author:

Nia Sandoval

SCIENCE 10 Genetics Review 1. Identify the 2 mistakes made in the following diagram of DNA: Cytosine Guanine -Thymine Adenine -phosphate 1. Thymine nine pairs with Adehine and Cytosine pairs Guanine. with -Sugar 2. Nucleic acids attached to sugar not phosphate on backbone. 2. Define the following terms: a. Allele g. Homozygous b. Trait h. Heterozygous c. Gene i. Offspring d. Recessive J. Phenotype e. Dominant k. Genotype f. Heredity a. error in DNA 3. If a chicken's DNA is composed of 26% guanine, what percentage will be cytosine? 26% 4. What is the relationship between a trait, a gene, and a chromosome? Genes code for traits, genes are found on DNA that is stored Pas chromosomes in cells 5. a. What is a mutation? b. substitution: one or more bases are replaced by different bases. insertion: It bases extra inserted intoy, DNA b. Describe the 3 types of mutations. c. Identify the 3 potential types of mutations. Outcomes In dogs, the gene for fur color has two alleles. The dominant allele (F) codes for grey fur and the recessive allele (f) codes for black fur. ff F f Ff a. The female dog is heterozygous. The male dog is homozygous recessive. If these two fFf ff dogs reproduce, what percentage of their offspring will be grey? 50% Ff FF F f FFFFF 25% b. The female dog is heterozygous. The male dog is heterozygous. If these dogs reproduce what percentage of their offspring will be homozygous dominant? Cystic fibrosis is a recessive genetic disorder. Ron is homozygous dominant and Nandy is, a carrier of cystic fibrosis. What is the probability that one of their children will have cystic fibrosis? 0% GG Ga ff 8. Patty is homozygous dominant for freckles, while Charlie is homozygous for no freckles. What is the probability of their children having freckles? 100% b deletion: It bases deleted from DNA FF BB/Bb c. advantageous deleterious neutral big's children 0% blue bBb Bb b Bb Bb 9. Eddie has brown eyes, while Cybil has blue. Brown eyes are known to be dominant. None of Eddie and Cybil's children have blue eyes. What must Eddie's genotype be? BB Eddie BB: Eddie Bb: 50% blue GG FF

Genetics Review Answer Key

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