4.3 Theoretical genetics 4.3.1 Define genotype‚ phenotype‚ dominant allele‚ recessive allele‚ co-dominant alleles‚ locus‚ homozygous‚ heterozygous‚ carrier and test cross * Genotype- the alleles of an organism * Phenotype- the characteristics of an organism * Dominant allele- an allele that has the same effect on the phenotype whether it is present in the homozygous or heterozygous state * Recessive allele- an allele that only has an effect on the phenotype when present in the
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Chapter ten focused primarily on evolution and natural selection. Evolution are the changes in traits‚ phenotypes‚ of groups of organisms over time. Darwin was influenced by Lamark and Malthus‚ who were other scientists during his time. Lamar believed that acquired characters are passed on to offspring. For example‚ giraffe necks would change for “adaptation”. Giraffes would be born with longer necks. Malthus believed that populations try to go beyond support capacity. He believed they go through
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If you are reading this you should go home and thank your mom. 40% of women choose to have an abortion ("Abortion in America."). Abortion is when a mother chooses to terminate her pregnancy. A mother can have an abortion up until right before the baby is born. There are two different kinds of abortion- in clinic abortion and the abortion pill. Three out of ten women in the United States have an abortion by the time they are 45. Some states require you to have your parents permission if you are under
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age at the same point in time. Question 9 0.5 out of 0.5 points A __________ is a prediction about behavior drawn from a __________. Selected Answer: hypothesis; theory Question 10 0.5 out of 0.5 points A zygote that separates into two clusters of cells instead of just one produces Selected Answer: identical twins. Question 11 0.5 out of 0.5 points A __________ is a segment of DNA along the length of the chromosome.
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generate any type cell 4. Stem cells are extracted from the egg destroying the embryo 4. Understand the basics of embryonic development j. Starts after fertilization and includes three stages: vii. Cleavage- the zygote divides into several smaller cells called blastomeres viii. Gastrulation-After cleavage‚ a rearrangement of cells forms a 3-layered embryo with a primitive gut.---3 germ layers(embryonic tissues) are created; endoderm‚ mesoderm‚ and ectoderm
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Prokaryotic cells vs. Eukaryotic cells Two Fundamentally Different Classes of Cells charcteristic Prokaryotic Cells Eukaryotic Cells word origins pro=before karyon=kernel or nucleus eu=true karyon=kernel or nucleus Domains of Bacteria 1. archaea or archaebacteria‚ more ancient in soil and water also in hostile environments‚ many without oxygen high salt/brine methanogens halophiles thermoacidophiles hot acidic springs 2. bacteria or eubacteria‚ more
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one are replaced by genes from another. Then chance determines which member of each pair will gather with others and end up in the same gamete. 4. Meiosis leads to variability among offspring. When sperm and ovum unite at conception‚ the resulting zygote has 46 chromosomes - 23 from each parent. D. Boy or Girl? 1. The 22 pairs of matching chromosomes within a human cell are called the autosomes. 2. The twenty-third pair consists of sex chromosomes. Females have an XX pair of sex chromosomes; males
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1. BIOLOGICAL CLASSIFICATION Aristotle’s classification - Aristotle was the earliest to attempt a more scientific basis for classification of organisms. - He classified plants into trees‚ shrubs & herbs and animals into two groups‚ those which had red blood and those that did not. Two-kingdom classification - In Linnaeus’ time Two Kingdom classification (Kingdom Plantae & Kingdom Animalia) was developed. Drawbacks of 2-kingdom classification Prokaryotes (Bacteria‚ cyanobacteria) and eukaryotes
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Question 1 | 1 points | Save | | Examination of the vaginal and cervical surfaces with a special magnifying instrument is called a ________scopy. | | | | | | | | colpo | | | vagino | | | cervico | | | culdo | | | | | | Question 2 | 1 points | Save | | ________itis is the inflammation of the inner lining of the cervix. | | | | | | | | Intercervic | | | Endometr | | | Endocervic | | | Perimetr | | | | | |
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blue green algae (i) red algae (ii) brown algae 4. Fucoxanthin is found in(i) red algae (ii) brown algae (iii) green algae( (iv) blue green 5. A diploid structure with a tough coat produced during unfavourable conditions is (i) zoospore (ii) zygote (iii)zygospore (iv) spore 6. A multicellular green algae is(i) Chondrus (ii) Laminaria (iii) Chlamydomonas (iv) Ulva 7. Which one of the following does not have flagellated male gamete? (i) Red algae (ii) Brown algae (iii) Mosses (iv) Green
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