BIOLOGY 1M03 Study Guide - Midterm Guide: Natural Selection, Phenylthiocarbamide, Zygosity

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blackherring683

8 Oct 2017

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D. 4. 1 explain how the hardy-weinberg equation is derived. The hardy-weinberg equation is often used for doing calculations of allele frequency. The hardy-weinberg equation is a formula that gives proportions of the diploid genotypes formed by random union of haploid gametes, or random mating between diploids. If there are two alleles of a gene in a population, the frequency of the alleles is represented by p and q. The total frequency of the alleles is 1: (cid:2198)+(cid:2199)=(cid:2778) When there is random mating, the chance of inheriting two copies of the first allele is p x p. The chance of inheriting two copies of the second allele q x q. Thus, the expected frequency of the homozygous genotypes is p2 and q2, while the heterozygous genotype is 2pq. The sum of all the frequencies is 1. (cid:2198)(cid:2779)+(cid:2779)(cid:2198)(cid:2199)+ (cid:2199)(cid:2779)=(cid:2778) www. ibscrewed. org. D. 4. 2 calculate allele, genotype and phenotype frequencies for two alleles of a gene, using the hardy-weinberg equation.

Related Questions

a) mitosis b) decrease c) Heterozygous recessive d) increase e) dominant f) homozygous dominant g) out- breading h) plant poination by bees i) heterozygous j) migration k)recessive l) large population m) evoltion n) meiosis o) founder effect

- Only the _____________________ phenotype indicates the individual's genotype.

- Inbreeding ____________________ genetic diversity.

- In Hardy Weinberg terms P2 represents the frequency of the ______________.

- ___________________ is an example of random mating.

- In Hardy Weinberg terms 2Pq represents the frequency of the _________________ individuals..

- In Hardy Weinberg terms P represents the frequency of the _________________ allele..

- Sexual reproduction ______________________ genetic diversity.

Hardy-Weinberg Equilibrium Problems

p is the frequency of the dominant allele in the population

q is the frequency of the recessive allele in the population

p2 is the frequency of the homozygous dominant genotype

q2 is the frequency of the homozygous recessive genotype

2pq is the frequency of the heterozygous genotype

p + q = 1

p2 + 2pq + q2 = 1 Find q2 ï q ï p ï p2 ï 2pq

A rare disorder of cystic fibrosis (characterized by abnormal transport ofchloride and sodium across an epithelium, leading to thick, viscous secretions) occurs every 1 in 3,300 births. To express this trait one must be homozygous recessive (ff).

The cystic fibrosis allele is represented by f. The normal allele is F. Suppose both parents have alleles Ff. The possible combinations of alleles in the children are FF, Ff, Ff and ff. The alleles ff will cause the disease. So, although the parents do not have cystic fibrosis, they can produce children with the disease. The parents are called 'carriers' of the disease

What is the frequency of the population that carries the trait? (Ff)

Rank the following terms in increasing order of scale accordingto your knowledge of their definitions:

-Locus
-Allele
-Chromosome
-Gene

If 16% of a population expressed a recessive trait, whatpercentage of the gene pool is the dominant allele?

Consider a population of Peach-faced lovebirds where:

65% of all gametes carry a dominant allele (F)for regular plumage (feather colors).

The remaining 35% carry the recessive allele(f) for a plumage with white.

When two heterozygous (Ff) individuals breed,we expect the genotype Ff to account for_____% ofthe new generation.

In the case of a species of sea lions displaying assortativemating (where individuals prefer to mate with individuals that looklike them), the conditions for Hardy-Weinberg Equilibrium are stillmet and supported (T or F)

If 90% of the alleles in a population are dominant, what is theratio of genotypes?

What are genes comprised of?

In the Hardy-Weinberg equation, what does 2pq denote?

Without strong natural selection, recessive alleles willinevitable disappear from a population T or F

If the proportion of sickle-cell sufferers(HbS-HbS homozygotes) in a population is 0.04,according to the Hardy-Weinberg equation, what is the proportion ofsickle-cell carriers (HbS-HbA heterozygotes) in thatpopulation?

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BIOLOGY 1M03 Study Guide - Midterm Guide: Natural Selection, Phenylthiocarbamide, Zygosity

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