The second generation of purebred cross of -hom-ozygo us recessive organism, with a —hom-ozygous dominant organism, contain a ratio of approximately _______ expressed dominant traits to recessive traits.
A. 2:1
B. 1:1
C. 1:3
D. 3:1

Answers

Answer 1

Answer:

D. 3:1

Explanation:

Gregor Mendel, in one of his numerous studies, performed a cross between purebred dominant (TT) pea plants and purebred recessive (tt) pea plants. All the offsprings of this cross appeared heterozygous tall (Tt) in the F1 generation.

However, when he self-crossed the F1 generation i.e. Tt × Tt, Mendel obtained a phenotypic ratio of 3 tall plants (dominant traits) : 1 short plant (recessive). This showed that the masked gene (recessive) was still present.


Related Questions

Macronutrients is the most readily available for energy production

Answers

Answer:

The correct answer is - true.

Explanation:

All the macronutrients carbohydrates, fats, and protein all three produce energy. Carbohydrates are the most preferred source of energy for the human body as it is the macronutrient that your system most requires.

The human body easily breaks down most carbohydrates and provides a significant amount of energy. The energy-providing process is called cellular respiration starts with glucose as a substrate. Glucose is the simplest carbohydrate.

Complete the comparison of the metabolic pathways leading to thymine in DNA and thymine as a modified base in tRNA.

Thymine in DNA occurs as the result of thymidylate synthase creating _______________ , which then undergoes ____________ to ____________, then to __________, and incorporated into DNA by ___________.

Answers

Answer:

The question is incomplete, the complete question is as follow:

Thymine in DNA occurs as the result of thymidylate synthase creating _______, which then undergoes _______ to _______, then to _______, and incorporated into D N A by _______. Thymine in tRNA arises ________, by an S-adenosylmethionine-dependent _______ of a ______ residue in RNA.

Answer:

Thymine in DNA occurs as the result of thymidylate synthase creating dTMP, which then undergoes phosphorylation to dTDP, then to dTTP, and incorporated into DNA by DNA polymerase. Thymine in tRNA arises posttranslationally, by an S-adenosylmethionine-dependent methylation of a UMP residue in RNA.

Explanation:

Thymidylate synthase is a key enzyme that catalyzes the synthesis of 2′-deoxythymidine-5′-monophosphate (dTMP) from 2′-deoxyuridine-5′-monophosphate (dUMP). This enzyme catalyzes the addition of a phosphate group (phosphorylation) of dTMP in order to form thymidine 5'-diphosphate (dTDP). Once synthesized, dTMP can be metabolized to deoxythymidine triphosphate (dTTP), which is a precursor for DNA biosynthesis. On the other hand, transfer ribonucleic acid (tRNA) is methylated after the molecule is synthesized. The transfer of the methyl group is catalyzed by an S-adenosylmethionine–dependent methyltransferase that catalyzes the methylation of uridine monophosphate (UMP) using SAM (S-adenosylmethionine) as the methyl donor.

ason Kimble's study of the Archaea in Snowy River in Fort Stanton Cave showed that Archaea play an important role in __________.

Answers

Answer:

Ecosystem.

Explanation:

Archaea play an important role in ecosystems with organisms that derive or produce energy from oxidation of methane. Many of Archaea are bacteria which are often a major source of methane in such environments and they can play a role as primary producers. Archaea is important for scientists because it has unique ecological roles and can also generate energy differently i.e. responsible for producing biological methane which no eukaryotes or bacteria can do that.

What is the effect of these currents on Earth's temperatures?

Answers

Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth's surface.

What are the types of honey bee?​

Answers

Answer:

kdjjdndkskkdjckfkfjsjjsjsmslaldjnxjcjc

Other Questions
Someone please help me find y if you dont mind Thankyouu so much Find the cross product (7,9, 6)x 44, 1, 5). Is the resulting vector perpendicular to the given vectors?a. (-57, 43, 33); yesc. (33. 59, - 57); nob. (39, 59,43), yesd. (33, - 57, 49); no Find the place value of 8 in 2456.1387.TenthsHundredthsThousandthsThousands Write the point-slope form of an equation of the line through the points (-4, 7) and (5,-3).0A. Y+4= -1; (1 7)B.Y-5 = = 10 (x+3)OC. y +3 = = 10 (2+5)D. y - 7= -5 (x+4) find the radius of a circle for which an arc 6 cm long subtends an angle of 1/3 radians at the center? plz some one can help to solve the question?? A woman gave birth 48 hours ago to a healthy infant girl. She has decided to do not breastfeeding. During your assessment you notice that both of her breasts are swollen, warm, and tender on palpation. The woman should be advised that this condition can best be treated by: how to work this fraction 4/11+5/22+3/44 What isf(x)=(x-2)(x-6) in standard form Why I Like Chocolate(1) There are many reasons why I like chocolate. (2) The first reason is that it tastes amazing. (3) Many people all over the world love chocolate and say that it is delicious. (4) Another reason why I like chocolate is that I can make other treats with it. (5) Chocolate pie, truffles, chocolate covered strawberries, and toffee are just a few of the treats that can be made with chocolate. (6) Finally, I like chocolate because it is good for your body. (7) I read many articles that say that dark chocolate is good for your heart. (8) The above reasons are just a few of the many reasons why I like chocolate.Identify the support detail for the third main point. Two heterozygous dominant parents for attached earlobes are crossed to predict the traits of their offspring. What is the ratio of attached earlobes to unattached earlobes in their offspring? A - 3:1B - 1:3C - 2:2D - 4:0 9)Using appropriate properties , find 7551231275115 HELP PLEASEi would really appreciate if someone answered this correctly! 2.Lucy shares 42 marbles between her and her 6 friends. How many does each child? HELP ME PLSSSSS I NEED HELP PLS PLS PLS ITS PYTHAGOREAN THEOREM HELP ASAP LIKE PLEASE any equations that equal three? Draw the line segment with endpoints (-5, 9) and (-1, -7) and find the value of y if x=-4;-2.5;-2;-1.5;0 plz answer asap Carbohydrates info A. AKA: B. Composed of: C. Monomer:D. Polymer:E. Functions: The data set represents the total number of pencils each student in a class needs to sharpen.0, 1, 1, 1, 2, 3, 4, 4, 6, 6, 9Which box plot correctly represents the data?A number line goes from 0 to 10. The whiskers range from 0 to 9, and the box ranges from 2 to 6. A line divides the box at 3. A number line goes from 0 to 10. The whiskers range from 0 to 9, and the box ranges from 2 to 6. A line divides the box at 4. A number line goes from 0 to 10. The whiskers range from 0 to 9, and the box ranges from 1 to 6. A line divides the box at 4. A number line goes from 0 to 10. The whiskers range from 0 to 9, and the box ranges from 1 to 6. A line divides the box at 3. Changing which of the following can reduce anger?A)diet B) Sleeping scheduleC)Communication styleD)Stimuli causing the anger