Genetics

Which term or phrase is used to describe the ability of the environment to cause different phenotypes to develop from the same genotype? A. Developmental plasticity B. Histone modification C. Phenotype variability D. Nutrigenomics A. Developmental plasticity How is alcohol consumption thought to increase methylation in cancer suppressor genes to increase the risk for head and neck cancer? A. Preventing DNA repair B. Enhancing cell division C. Acting as a methyl donor D. Activating ...

DNA fragments cut by restriction enzymes can form two types of ends. What are these ends called? Sticky and blunt ends The restriction enzyme HincII was isolated from the bacterium Haemophilas influenza. The DNA sequence cut by this enzyme is shown here. (Note that Y means any pyrimidine--C or T--and that R means any purine--A or G.) CTY*RAC GAR*YTG HincII is a blunt-end cutter that cuts after the Y. The lambda phage genome is 48.5 kb in size and has 50% GC content. Approximately how ...

What are 3 ways to improve GWAS? - more power -> increase sample size, increase effect - better chip design or sequencing to detect rarer variants - better case vs control definition -> e.g. some control may have hypertension (ht) but not identified and the study may be looking at genome for ht What would it mean if HT had fewer risk alleles of larger effect sizes than other complex phenotypes? identification of susceptible variants for ht is likely to be reliant on synthesis of findi...

The principles of dominance, segregation, and independent assortment were first described by A. Darwin B. Waston and Crick C. Lamarck D. Mendel Gregor Mendel developed some basic principles of heredity based on his (1) dissection of the flowers of both tall and short African violet plants (2) microscopic observation of the nuclei of fruit fly cells (3) biochemical analysis of DNA produced in the F2 generations of roan cattle (4) mathematical analysis of the offspring produced by crossin...

Why do scientists think that all forms of life on earth have a common origin? All living organisms use the same genetic code Related genes from different organisms have similar nucleotide sequences Different organisms have related genes with similar functions Related genes from different organisms have similar amino acid sequences All the choices are correct All the choices are correct If an Ss x Ss mating is performed and the progeny have the following phenotypic ratios of 3 S_ , (- in...

The two strands of DNA are said to be ___ to each other since adenine is always across the molecule from thymine and cytosine is always across the molecule from guanine. Pick the best answer. Complementary The nucleotides along each strand of DNA are joined by ____ bonds. ___ bonds join one nucleotide to the next along a strand of RNA. Phosphodiester Is the helical coiling shown in this picture a right-handed or left-handed coil? Right-Handed Coil X-ray diffraction experiments conducted...

What does DNA stand for? Deoxyribonucleic acid Segments of DNA which code for specific proteins are called... Genes DNA may coil and condense into visible structures called... Chromosomes How many nitrogenous bases are found in DNA? Four What two nitrogenous bases are purines? Adenine and Guanine What two nitrogenous bases are pyrimidines? Cytosine and Thymine Adenine always pairs with... Thymine Cytosine always pairs with... Guanine What chemical bond holds the nitrogenous base ...

The roads are information stored inside the Nucleus which is chromosomes that contain many genes The largest amount of DNA in a plant cell is contained in A nucleus Genes involved in the production of abnormal red blood cells have an abnormal sequence of Bases The diagram below represents an incomplete section of DNA molecule. The boxes represent unified basis. What will be the total number of bases represented by the letter A( both inside and outside the boxes) when the boxes are complete...

Which would NOT be an effective way to diagnose sickle cell anemia? A Enzymatic assay for hemoglobin activity. B PCR exon 1 of the b-globin gene, followed by ASO hybridization with oligonucleotides specific for normal and betaS alleles. C Restriction digest of genomic DNA with MstII, followed by Southern blot, using a b-globin gene product. D PCR exon 1 of the b-globin gene, followed by restriction digest with MstII. E Hemoglobin electrophoresis. A All of the following provide supporting ...

genetics scientific study of heredity (the delivery of characteristics from parent to offspring) fertilization process in sexual reproduction in which male and female reproductive cells (gametes) join to form a new cell trait specific characteristics of an individual hybrid offspring of crosses between parents with different traits gene a factor that is passed from parent to offspring; sequence of DNA that codes for a protein and thus determines a trait allele one of a number of diffe...

A pea plant heterozygous for height and seed color (TtYy) is crossed with a pea plant heterozygous for height but homozygous for seed color (Ttyy). If 80 offspring are produced, how many are expected to be tall and have yellow seeds? 30 offspring How many sets of chromosomes are in a diploid cell? Two sets The gene map of a fruit fly's chromosomes shows the relative locations of the star eye, dumpy wing, and black body genes to be 1.3, 13.0, and 48.5. Between which two genes does crossing...

genetics The scientific study of heredity, or delivery of characteristics from parent to offspring, known as _____ is the key to understanding what makes each organism unique. Gregor Mendel Concluded that traits are inherited through the passing of factors from parents to offspring. fertilization During sexual reproduction, male and female reproductive cells join in a process known as ________ to produce a new cell. True breeding "____________," meaning that they were self- polli...

Which statement describes the offspring of the F1 generation when crossing a pea plant that is true breeding for green seeds with a pea plant that is true breeding for yellow seeds? The offspring will inherit one allele from each parent. What is a gene? A section of DNA Some people have freckles, and some people do not have freckles. If a child has freckles, at least one parent has freckles. However, the child may have a sibling that does not have freckles. Which statement best describes the...

Genetics The study of heredity Gregor Mendel The father of modern genetics Chromosomes found in the nucleus and carry genes 1822 Year Gregor Mendel was born pea plants plant studied by Gregor Mendel Genotype The genetic makeup of an organism Alleles varients or differences in a gene Phenotype An organism's physical appearance, or visible traits. Dominant

Mendel was able to study seven traits in all the pea plants in each generation. Which of his hypotheses allowed him to analyze each trait separately? Wrong. For each inherited trait, there is only one copy of the gene that codes for that trait. If a scientist wanted to follow Mendel's experiment with a different kind of plant, which type of plant would she examine? A plant that has only two alleles for a trait.

Which is the best example of a hypothesis leading to new experimental methods? Thomas Hunt Morgan continued the genetic research of Gregor Mendel, but Morgan used fruit flies. The table below summarizes the traits that Mendel examined during his experiments. Traits Studied by Mendel What do these characteristics all have in common? They can all be easily observed. Tall pea plants are dominant over short pea plants. If there are 200 short plants in the F2 generation from a cross tha...

Cystic fibrosis is a genetic disorder. It is a recessive trait that is determined by two alleles. Suppose two parents each carry at least one recessive allele, but neither of them has cystic fibrosis. Which statement reflects the likelihood of a child of these parents having cystic fibrosis? The child may or may not have the disease because a recessive gene from each parent may be passed on. During an experiment, a scientist crosses a pea plant that has purple flowers with a pea plant that has...

Tall pea plants are dominant over short pea plants. If there are 200 short plants in the F2 generation from a cross that followed Mendel's methods, about how many plants will be tall in that generation? 600 If Mendel had crossed a true breeding dominant plant with a true breeding recessive plant, in which of the three generations is the recessive trait visible? P generation and F2 generation If a scientist wanted to follow Mendel's experiment with a different kind of plant, which type ...

Which statement describes Mendel's hypotheses regarding gametes? A gamete carries one allele for a gene. What controls traits and inheritance? nucleic acids Scientists often use fruit flies as a method to test hypotheses about human genes. Why are fruit flies advantageous in the study of human inheritance? They reproduce quickly and take up little space. The flowchart below shows the three generations of a cross between a pea plant that has yellow pods and a pea plant that has green pod...

GENETICS TEST - EXTRA STUDY GUIDE INFO QUESTIONS WITH COMPLETE ANSWERS { GRADED A+} Any substance or chemical not naturally produced or found within an organism (ex: medications) - xenobiotic T/F? physiologic changes in pregnancy influence maternal absorption and distribution of drugs to fetus - TRUE increased maternal _______ prolongs gastric emptying time and slows intestinal motility impacting _____ circulation and absorption of xenobiotics which results in reduced peak materna...