Name: Mohammed Alghamdi BIOL lab II 1-A cross gives a 3:1 phenotypic ratio. What are the genotypes of the parents? 3:1. (heterozygous parents) 2- According to Mendel’s law of segregation‚ parents who both have the genotype Aa would produce what gametes? A germ cell Aa undergoes meiosis 3-What is the genotype of a plant that produces green peas? Yellow peas are dominant. Yy or yy when crossed with a heterozygote (Yy) will give some offspring that are green 4- To determine whether an animal with
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Key innovation in human evolution is the development of bipedalism and gradual increase in size of brains. The evolution might have occurred due to change in climate and environment which lead to reduction and replacement of trees with grasslands. Due to presence of large numbers of trees‚ it was easier for our ancestors to have quadrupedalism instead of bipedalism‚ so that they can climb on trees and move from one place to another. But with the decrease in number of trees‚ requirement for bipedalism
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or absence of special chromosomes. As a result of meiotic segregation‚ each gamete has one sex chromosome to contribute at fertilization. Sex determination is strictly chromosomal and is not usually influenced by the environment. There are two types of sex namely Heterogametic sex: The sex that produces two kinds of gametes and determines the sex of the offspring. Homogametic sex : The sex that produces one kind of gamete Humans‚ have an X-Y mechanism that determines sex at fertilization. There
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Sept 27‚ 2010 Chapter 4 * With four valence electrons‚ carbon can form four covalent bonds with a variety of atoms * This tetra valence makes large‚ complex molecules possible * Fundamental groups: Alkanes and Alkenes * The electron configuration of carbon gives it covalent compatibility with many different elements * The valences of carbon and its most frequent partners (hydrogen‚ oxygen‚ and nitrogen) are the “building code” that governs the architecture of living
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Pregnancy is the fertilization and development of one or more offspring‚ known as an embryo or fetus‚ in a woman’s uterus. It is the common name for gestation in humans. A multiple pregnancy involves more than one embryo or fetus in a single pregnancy‚ such as with twins. Childbirth usually occurs about 38 weeks after conception; in women who have a menstrual cycle length of four weeks‚ this is approximately 40 weeks from the start of the last normal menstrual period (LNMP). Human pregnancy is the
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environment deteriorates as its competitors evolve new adaptations. Evolution is said to be escalatory. In sexual reproduction‚ a new organism is formed by the fusion of two gametes. It is to be contrasted with asexual reproduction‚ in which females produce offspring without any male contribution; the female’s gametes develop directly into female
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All organisms that are considered to be alive must possess certain key characteristics or functions. These include: order‚ response to the environment‚ reproduction‚ growth and development‚ regulation‚ energy processing and evolution. Since we recognize life by what living things do‚ these seven characteristics serve to define life. Organisms consist of one or more cells and while they may be very complex they are highly organized and coordinated. Inside each cell‚ atoms make up molecules.
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CHAPTER 8 1) DNA is found in structures called ______. -chromosomes 2) A(n) ______ is an example of an organism that can reproduce asexually. -amoeba 3)+++ Examine the figure below. Nucleosomes are made of ______. - DNA wrapped around histone proteins 4)++ As shown in the following figure‚ plant cell cytokinesis differs from animal cell cytokinesis because - Plant cells form a cell plate and animal cells do not 5)The chromosomes of eukaryotic cells are found in the _____ -Nucleus 6) Chromatin consists
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red font color. Q Term Answer Statement 1. A. Allele Process in sexual reproduction in which male and female reproductive cells join to produce a new cell. 2. B. Fertilization A specific characteristic of an individual. 3. C. Gamete One of a number of different forms of a gene. 4. D. Gene Offspring of crosses between parents with different traits. 5. E. Hybrid A sequence of DNA that codes for a protein and thus determines a trait; passed from parent to offspring
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likely to differ slightly from this value. A–13 2. List all gametes that could be made by a pea plant heterozygous for seed color‚ seed shape‚ and pod shape (YyRrIi; see Table 14.1). How large a Punnett square would you need to draw to predict the offspring of a self-pollination of this “trihybrid”? 2. The plant could make eight different gametes (YRI‚ YRi‚ YrI‚ Yri‚ yRI‚ yRi‚ yrI‚ and yri). To fit all the possible gametes in a self-pollination‚ a Punnett square would need 8 rows and 8
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