Biology B – Primavera With Complete Answer-2024

which statement is true about recessive traits ? - answer Recessive traits can only be expressed with recessive alleles replace X and Y with the correct answers x is the genetic makeup of an organism , as determined by the alleles , while Y is the observable form - answer x : genotype y : phenotype read the statement : When Mendel crossed a purple-flowered pea plant with a white-flowered pea plant , the offspring always gad purple flowers , when Mendel crossed the offspring with each other , the second-generation offspring had some white-flowered plants . what conclusion can be drawn from this observation ? - answer there is a chance that any second-generation plant will be a white-flowered one . which statement defines heterozygous ? - answer a genotype composed of two different alleles some people have dimples ; other people do not . Having dimples is dominant over not having dimples . if the alleles for having dimples is represented with the letter D , what allele combinations can result in having dimples - answer DD , Dd which statement is true about model organisms ? - answer they help scientists understand biological processes Read the statement : When Mendel crossed a purple-flowered pea plant with a white-flowered pea plant , the offspring were always X . When Mendel crossed the offspring with each other , the distribution was about Y purple and Z white . The more experiments Mendel did with pea plants , the closer they approached these percentages . Which option correctly replaces X , Y , and Z in the statement ? - answer x : purple y : 75% z : 25% A pea plant that is tall has a dominant trait . Which statements are true about the genotype / phenotype relationship of the plant ? Select all that apply . - answer - The genotype Tt always results in a phenotype that is tall . - When the phenotype is tall , the genotype can either be TT or Tt . What statement would be true according to the theory of blending inheritance ? - answer The offspring of a tall parent plant and a short parent plant will all have a height in the middle . Mendel crossed a tall pea plant with a short pea plant . All the offspring in the first generation were tall pea plants . How did Mendel explain why all the offspring were tall pea plants ? - answer Two factors affect the height trait of pea plants . One of the factors is dominant over the other . In some situations , when two purple-flowered pea plants reproduce , the offspring can have purple or white flowers . When this experiment is run repeatedly , it is discovered that three-fourths of the offspring have purple flowers and one-fourth of the offspring have white flowers . What would happen if this experiment were run only once ? - answer The experiment would result in a plant with either purple or white flowers . The conclusion would depend on this single result and would not be accurate . What statement is true about heterozygous organisms ? - answer Heterozygous organisms are more genetically diverse than homozygous organisms. A type of insect can be red or black . Red is the dominant trait and is represented by a capital R . Identify the Punnett square that illustrates all offspring being homozygous recessive for a trait . - answer all lowercase r Parent A is homozygous dominant for curly hair , and Parent B is homozygous recessive for straight hair . What is the expected phenotype of the offspring ? - answer curly hair What can be shown by a dihybrid cross experiment ? - answer The inheritance of one trait does not affect the chance of inheriting another . A dihybrid cross experiment produces offspring of four different types in the F2 generation . What is the predicted ratio of the four phenotypes in the offspring ? - answer 9:3:3:1 Which statement best describes a monohybrid cross ? - answer a cross in which traits of several different characteristics are studied Twenty-five percent of the possible offspring for a cross are homozygous dominant . What genotype do each of the parents have ? - answer heterozygous In pea plants , green seeds are dominant (Y) , and yellow seeds are recessive (y) . The following Punnett square shows a cross for seed color . - answer 100 percent