Three Biology questions i need help with please?:)?
1. In the late 1800s, Mendel predicted the existence of units of hereditary information or factors. What do we call these units of hereditary information today? (Points : 3) A genes B proteins C loci D chromosomes 2. Which term describes the form of a gene that produces a specific trait, such as eye color? (Points : 3) A chromatid B gamete C chromosome D allele 3. Which term describes a type of trait that is usually expressed only when an organism has two identical alleles for the trait? (Points : 3) A dominant B recessive C homozygous D heterozygous
Please help with these biology questions?
1) the fact that all seven of the garden pea traits studied by Mendel obey the principle of independent assortment means that a) seven pairs of alleles determining these traits are on the same pair of homologous chromosomes. b) pea plants produce gametes with seven chromosomes c) seven pairs of alleles determining these traits behave as if each is on separate chromosome pairs. d) pea plants have seven pairs of chromosome. 2) what structure would be found in dividing plant but not animal cells? a) a mitotic spindle b) a cell plate c) a contractile ring d) sister chromatids 3) the information of a gene is specified in a) the repeating sugar and phosphate molecules b) the proteins of the ribosome c) the centrosome d) the order of bases A, T, G, and C e) the 20 different amino acids of proteins
My study group needs help with these biology questions!?
In Mendel's basic experiment, he began with true-breeding parental (P) plants. What did he see when he cross-fertilized P plants that had different traits? A) All F1 plants had the trait of one or the other P plant. B) The F1 plants showed a combination of the two P traits, in a 3:1 ratio. C) The F1 plants showed a combination of the two P traits in a 1:1 ratio. D) The F1 plants had new traits that were a blend of P traits. E) The F1 plants had an entirely new trait, not seen in either P plant. Dimpled cheeks is dominant to undimpled cheeks. If there exists a 50% chance that a child will have dimpled cheeks, the parental genotypes must be A) DD and dd. B) DD and Dd. C) Dd and Dd. D) Dd and dd. E) dd and dd.
Need help with these Biology questions.?
1. In his basic experiments, Mendel began with true-breeding parental (P) plants. What did he see when he cross-fertilized P plants that had different traits? D. All F1 plants had the trait of one or the other P plant (All offspring were heterozygous so displayed the dominant trait). 2. A trihybrid cross would: A. follow a gene that affects three different traits B. follow a gene for which there are three alleles C. follow three traits in a cross D. follow a trait over three generations E. be a cross involving gametes from three different individuals F. None of the above A trihybrid cross follows three CHARACTERS (genes), not three traits (alleles). 3. In Mendel's pea plants, yellow seeds are dominant to green seeds. If a true-breeding green-seed-producing plant is crossed to a heterozygous yellow-seed-producing plant, what percentage of offspring produces green seeds? C. 50% .... Y ... y y | Yy | yy y | Yy | yy F1 genotypes: Yy = 1/2; yy = 1/2 F1 phenotypes: yellow = 1/2; green = 1/2 4. The D gene controls pea plant height. The DD and dd genotypes confer tall and dwarf phenotypes, respectively. What is the relationship between D and d? E. They are alleles of the same gene 5. If a cell has a haploid number of 5, during mitosis there will be _____ chromosomes at metaphase, ______chromosomes at anaphase, and _______chromosomes per daughter cell at telophase. D. 10,20,10 haploid (n) is 5, so diploid (2n) is 10. At metaphase, there will be 10 chromosomes, each consisting of 2 sister chromatids. At anaphase, the 2 sister chromatids of each chromosome separate and each then becomes a chromosome, so there would then ben 20 chromosomes (10 headed towards each pole). In telophase, after cytokinesis has produed 2 daugther cells, each cell would have the 10 chromosomes that were moved to that pole during anaphase. So the 2 daugther cells end up with the diploid number of chromosomes.
BIOLOGY! NEED HELP ASAP. WIll GIve 50 points?
1. Mendel predicted the existence of units of hereditary information that parents passed down to offspring. What do we call those units of hereditary information today? (Points: 1) genes proteins loci chromosomes 2. Roosters have genes that determine feather length. Which term describes the form of a gene that produces a specific trait, such as long feathers or short feathers? (Points: 1) chromatid gamete allele DNA 3. Which statement best describes how alleles are related to genes? (Points: 1) A gene is always dominant to an allele. An allele is a form of a gene that determines a specific trait. A gene is a form of an allele. Genes are located on alleles in chromosomes. 4. Assume that the allele for dark brown hair in dogs is D and the allele for light brown hair is d. What is the genotype of a dog that has light brown hair? (Points: 1) DD Dd dd dD 5. Which principle did Gregor Mendel discover about traits? (Points: 1) Traits are passed from only one parent to the offspring. Traits exist in only one form or version. Traits are passed in discrete units from parent to offspring. Units of genetic information that govern traits are located in cell membranes. 6. How did Gregor Mendel learn about heredity? (Points: 1) He carefully observed the chromosomes of pea plants and collected data on them. He collected detailed information on inherited traits of pea plants. He did research about the DNA of pea plants and kept careful records. He bred animals for desired traits and collected data on the offspring.
Mendel's Genetics??? biology homework!!!?
1.One major reason that the pea plants were a good choice for Mendel's studies because the plants (a)can also be eaten as food (b)displayed several traits in one of two contrasting forms. (c)had only on trait with several forms (d)required a large space for growth 2.The first filial (F1) generatio is the result of (a)cross pollination among parents and the next generation. (b)the cross between two individuals of parental generation. (c)the cross between the pffspring of a parental cross (d)many cosses between parental stock. 3.A 3:1 ratio of tall to short appearing in the F2 generation lends support to the principle of (a)recessiveness (b)mutation (c)segregation (d)incomplete dominance 4.If a mother and father have 5 children, what is the probability that they will all be boys? (a)1/5 (b)1/10 (c)1/32 (d)1/64
I need help with these answers biology?
Wow, this is extremely long but I'll try to do my best. 1. Gregor Mendel used pea plants to study because he wanted to study genetics, which is the scientific study of heredity. He wanted to cross- pollinate different pea plants, such as yellow and green peas, and study their offsprings. He would come to 2 conclusions; Biological inheritance is passed on by chemical factors called genes from one generation to another, and the principle of dominance, which states that some alleles, or different types of genes, are dominant while others are recessive. 2. Genes are chemical factors that determine traits. 3. From the parents, their alleles. (I'm not sure, please check your book.) 4. Principle of dominance states that some allees are dominant while others are recessive. 5. Because the allele for tallness is dominant over the allele for shortness. 6. It can be used to compare offsprings and the probablility that an offspring that will have a certain characteristic will be born. 7. 3/4 8.homozygous 10. It can be used to predict and compare the outcomes of genetic crosses. 14. This is called codominance, where both alleles contribute to the phenotype. 15. Many genes, this is called polygenic. 16. Apply to fruit flies and other organisms. 17. They're small and will reproduce quickly. 39. species 40. mammals 47. I believe fungi?? This is as far as I can go, but I hope I helped much. Good luck. Please check the book, there are the answers there and I know that because you have the same book that I'm using.
I need help with biology its about mendel and his works?
these are the last questions of my homework that i just didn't understand 1.) describe the contribution of mendel to the foundation of modern genetics. 2.) describe why garden-pea plants are good subject for genetic experiments. 3.) summarize the design of mendel's pea- plant studies. 4.) state the ratio Mendel obtained in each F2 generation for each of the characters he studied. 5.) What differences would be expected in experiments with squash plants, which usually do not self-pollinate? 6.) When two true-breathing pea plants that show contrasting traits are crossed, all of the offspring show a. both forms of the character b. one form of the character c. one-fourth of each trait d. a different trait
Biology help? Mendel discovered that inheritance follows the rules of chance?
Here are some questions from my biology homework that I need help with. I need these tonight. Help! 1. What are the two possible gametes produced by a plant that has the genotype Aa? Give the probability of each type of gamete. 2. Use a Punnett square to predict the genotypes produced if the plant in Question 1 is self-fertilized. Calculate the probability of each outcome. 3. List all the possible genotypes of a pea plant with purple flowers and round seeds. 4. List the four possible allele combinations in the gametes of a plant with genotype PpWw.