2. What might determine whether a person who shows the dominant characteristic is homozygous dominant or heterozygous? When a person shows a dominant trait, their genotype can be homozygous dominant or heterozygous. Homozygous dominant genes are usually noted as two capital letters, while heterozygous genes have one capital and one lowercase letter. This signifies that in heterozygous genes, there is one dominant gene and one recessive, while homozygous genes are both either dominant or recessive.
a. GgWw b. GGWW c. ggWW d. GGww e. ggww Check your work. Answer is e. If the genotype of an individual is to be tested, the best cross to perform is the testcross, to a homozygous recessive. All of the other crosses will allow potential recessive alleles in the yellow round
a. What are the parental genotypes? (Hint: the sex of the parent is important) b. What F1 phenotypic and genotypic ratios are produced from this cross? (Show your Punnett Square) 5.
The banding patterns on the abdomen also differ between males and females; males have a more uniform color while females have more distinct banded pattern (lab manual). However, the most accurate gender-identifying feature of Drosophila is the male and female genitalia. Males have a darkly pigmented genital arch over the penis while females have smooth and light-colored genitalia (lab manual). Alleles are versions of genes and are the genetic instructions to making proteins (lab manual). Mutations occur when an allele prevents a protein from forming or code for a variation in the protein, which can affect the physical appearance, or phenotype, of an organism.
PART ONE BLASTN 6a. Briefly explain what information is contained within this summary. This summary includes the identification and name of the species that the sequence originated from, the chromosome number, the accession value, and then the score and the e-value. 6b. Given your knowledge of sequence similarity measures, which color is least desirable?
The Evolution of Populations Study Guide A Answer Key Section 1. Genetic Variation Within Populations 1. B 2. d 3. gene pool 4. combinations of alleles 5. allele frequencies 6. ratio or percentage 7. mutation 8. recombination 9. hybridization 10. gene pool 11. allele frequency Be Creative: Logos may vary but should illustrate the importance of genetic diversity. Section 2. Natural Selection in Populations 1.
Explain the difference between homozygous and heterozygous. (p.185) 10. Explain the difference between genotype and phenotype. (p.185) 11. If the parental genotype is Ee, what are the possible gametes?
The women’s movement and the consequent development of feminist ideas in the 1960s and 1970s influenced the question of gender and began emphasise the importance of gender as a concept of its own. (Howson, 2013, 51). To understand the differences between male and female, it is important to formulate a basic distinction between gender and sex. The key distinctions to note are based around biology and social arrangements. Oakley (1972, cited in Howson, 2013) refers to gender as the ‘psychological, social and representational differences between men and women, which are socially determined and culturally variable’.
HOMEWORK – Describe and evaluate the Biological approach in psychology Describe the approach, evaluate it and compare the four approaches AO1= Assumptions (+ expand on each and include one study) AO2= Strengths, limits, compare with social learning theory The biological approach follows nature’s side of things by looking at genetics. It can be used to evaluate heritability, for example, with twins. There are certain traits which run within families but they all live in the same environment, this means we can’t be sure whether the traits are influenced or genetic. In order to test this Bouchard and McGue conducted a meta-analysis. There should be 100% concordance between identical twins and twins that aren’t identical should show a much lower rate.
Mendel's Law of Segregation Mendel's Law of Segregation stated that the members of a pair of "homologous chromosomes segregate during meiosis and is distributed to different gametes." This prediction was divided into four main ideas. The first idea was that different versions of genes caused changes in the "inherited characters." The alleles would create different variations in inherited characters. The second idea was that for every character, an organism inherits two genes, one for each parent.