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Lana71 [14]
4 years ago
13

In corn, small pollen (sp) is recessive to normal pollen (sp+) and banded necrotic tissue, called zebra necrotic (zn), is recess

ive to normal tissue (zn+), The genes that produce these phenotypes are closely linked on chromosome 10, If no crossing over occurs between these two loci give the types of progeny expected from the following cross: a) sp+ zn+/sp+zn+; sp+ zn+/sp zn: sp zn/sp zn b) sp+zn/sp zn;l sp zn +/sp zn c) sp + zn/sp zn: sp zn/sp zn d) sp+zn/sp+ zn; sp + zn/sp zn+; sp zn+/sp+ zn; sp zn+/sp zn+ e) sp+ zn+/sp zn; sp+ zn/sp zn
Biology
1 answer:
Colt1911 [192]4 years ago
8 0

Answer: sp+ zn+/ sp+ zn+ ; sp+ zn+/ sp zn; sp zn / sp zn ​

Explanation: f a double heterozygote is testcrossed and gametes are produced in a ratio of 1:1:1:1, this can be interpreted as unlinked genes or as genes that are 50 map units apart. Because gametes this far apart cannot be distinguished from gametes that are unlinked, it's not possible to get a ratio of gametes that indicates a distance of greater than 50 map units.

A man and a woman are trying to have children but are unsuccessful. As part of a series of tests, the man is karyotyped. His autosomes appear normal, but his sex chromosomes, shown in the following diagram, are not. The diagram also shows a normal male's sex chromosomes for reference.

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Match each form of Energy with it's definition. The sum of an object's kinetic and potential energies. Question 9 options: mecha
andreev551 [17]

Hi, friend!

The Answer is Mechanical energy!

Match each form of Energy with it's definition. The sum of an object's kinetic and potential energies?

xXxAnimexXx

♛┈⛧┈┈•༶​♛┈⛧┈┈•༶​​

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3 0
3 years ago
Why is formation of atp by atp synthase in the mitochondria known as oxidative phosphorylation?
Softa [21]

Answer:

Because the redox reactions create proton gradient which is responsible for the production of ATP

Explanation:

During the process of aerobic respiration, the electron transport occurs in mitochondria through a sequence which is known as electron transport chain. When electrons are transferred from one complex to the other complex present in the inner membrane of mitochondria, the redox reactions occur and as a result of these redox reactions the proton gradient is created across the inner membrane of mitochondria. This proton gradient is further used to drive the synthesis of ATP with the help of ATP synthase. As the redox reactions create proton gradient which is responsible for the production of ATP, the process is named as the oxidative phosphorylation.

8 0
3 years ago
A rock that forms when magma hardens beneath earth's surface is called an
grin007 [14]
A rock that forms when magma hardens beneath earth's surface is the Igneous rock
6 0
3 years ago
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The absorptive effectiveness of the small intestine is enhanced by increasing the surface area of the mucosal lining. Which of t
bekas [8.4K]

Answer:

plicae circulares and intestinal villi

Explanation:

The inner wall of the intestine is full of wrinkles, called villi. An enlargement of them under the microscope reveals that they are formed by cells whose surface has innumerable small "wrinkled" structures. The small intestine is the largest viscera of the body (about six meters). Intestinal villi and microvilli increase the area of ​​contact with the intestine as well as the speed of absorption of food. Blood capillaries and lymph are in these villi to absorb nutrients.

The intestinal villi, have the function of increasing the absorption of nutrients after digestion. They are the folds of the intestines. The surface of the villi has an area of ​​12 cm² and the microvilli 240 cm².

Villi and microvilli increase the area of ​​intestinal absorption by approximately 30 times and 600 times, respectively, providing exceptionally efficient absorption of nutrients in the lumen.

The entire small intestine has circular folds of mucosa, also called Kerckring valves and circular plicae. Most extend transversely around the small intestine cylinder for about half or two-thirds of its circumference, but some form complete circles, and some have a spiraling direction; The latter usually extend a little more than once around the bowel, but occasionally two or three times. Circular folds slow the passage of partially digested food along the intestines and provide an increased surface for absorption.

6 0
3 years ago
The (matrix / stoma / cytoplasm / nucleolus) is the innermost compartment of a (cytoplasm / cell wall / mitochondrion / nucleus)
Olin [163]

Answer:

Matrix, Mitochondrion, Kreb's cycle, Pyruvic acid

Explanation:

The above question illustrates aerobic cellular respiration, specifically the second stage called Kreb's cycle or Citric acid cycle. This process occurs in the inner membrane of the mitochondrion of eukaryotic cells called MATRIX.

It occurs when the pyruvic acid produced during Glycolysis (first stage of cellular respiration that occurs in the cytoplasm) is converted to Acetyl CoA in order to enter the citric acid cycle in the mitochondrion. The Acetyl CoA is then used in a series of reactions that comprises of reduction-oxidation, hydration, dehydration, and decarboxylation.

This reactions involving 8 steps converts the Acetyl CoA (from pyruvic acid) to 2 molecules of CO2, 1 molecule of GTP/ATP, and electron donors NADH2 and FADH2.

8 0
3 years ago
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