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3 years ago

Fill in the blank

1 answer:

8 0

Answer: most sex-linked genes are on the X chromosomes because they are larger than Y chromosomes. Males are more likely than females to exhibit sex-linked traits

Explanation:

Males are more likely than females to display recessive traits because a single recessive gene on the X chromosome is often not matched by a Y chromosome allele and therefore expressed.

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Drag each label to the correct location on the image.

ratelena [41]

Answer:

The offsprings of this punnet square will be Dd, Dd, dd and dd in a ratio 1Dd : 1dd

See attached image for punnet square completion

Explanation:

This question involves a cross involving a single gene with alleles D and d where allele D is dominant over allele d i.e. D will mask the phenotypic expression of d in a heterozygous state.

This cross is between a heterozygous parent (Dd) and a homozygous recessive parent (dd). Parent Dd will produce gametes D and d while parent dd will produce gametes d and d.

Using these gametes in a punnet square, four possible offsprings with two distinct genotypes will be produced. The genotypes are: Dd and dd in a ratio 1:1

Hence, the possibility of having a heterozygous dominant offspring is 1/2 while the possibility of having a homozygous recessive offspring is also 1/2.

4 0

3 years ago

What is an accessory organ of digestion

Leto [7]

Answer:

An organ that helps with digestion but is not part of the digestive tract. The accessory digestive organs are the tongue, salivary glands, pancreas, liver, and gallbladder.

3 0

3 years ago

If glucose is metabolized under completely anaerobic conditions, pyruvate ( Please explain why each answer is wrong or right.)

Nostrana [21]

Answer:

Explanation:

A is wrong because pyruvate would enter the Krebs cycle under aerobic condition (when oxygen is present). Hence the name aerobic cellular respiration

C. I do not really too much about fructose or the concentration of oxygen, but I can assure that this answer choice is not correct.

D is wrong because NADH would be converted from NADP+. Either with oxidation or reduction, and this helps to keep this process going.

B is correct because fermentation is another word for anaerobic cellular respiration. The process takes place with the absence of oxygen. It either goes through Alcoholic or lactic acid fermentation.

I hope this helps!

7 0

3 years ago

What are the four types of tissues?

ElenaW [278]

The term ''tissue'' refers to a group of similar cells. Being a combination of equal cells, a tissue has the same function in any part of the body.

The four types of tissues are:

. The epithelial tissue

. The connective tissue

. Muscle tissue

. The nervous tissue

. The epithelial tissue serves as a cover, among these are the skin and the lining of several ducts inside the body. It is divided into two general classifications: Simple Epithelium and Stratified Epithelium.

. The connective tissue supports and joins other tissues such as bone, blood and lymphatic as well as adipose tissue and reticular tissue.

. Muscle tissue consists of striated or voluntary muscles that move the skeleton and smooth muscle, such as the one that surrounds the stomach. It is divided into three types: Skeletal Muscle Tissue, Cardiac Muscle Tissue and Smooth Muscle Tissue.

. Nervous tissue is formed by nerve cells or neurons and serves to carry messages to and from various parts of the body. This tissue is present mostly in the brains and spinal cord. It has two types of tissue: The Nerve Cell and the Neuroglia.

7 0

4 years ago

Scientists interested in knowing the best way to restore an area after a temporary road was built through it completed a study c

Drupady [299]

Answer:

This study was focused on an Ecosystem level, as it involved soil properties and above-ground vegetation interacting with mentioned soil physic properties.

Explanation:

Ecological studies can be performed at different hierarchy levels:

- Organism: This is an individual physiologically independent from other individuals. At this level, it must be understood how an organism survives under certain changing physic and chemistry conditions, and how it behaves to reproduce, avoid predators, and find food.

- Population: Groups of individuals from the same species, with similar characteristics, capable of crossing, leaving offspring that live in the same habitat at the same time. At this level, it is interesting to know the size of the population required to leave fertile offspring that ensure the population will survive over time. It is also interesting to know genetic variability that allows evolutive adaptation to environmental changes.

- Community: Relationship or interaction between different species groups that live in the same habitat and at the same time. At this level, it is interesting to study inter-specific interactions that could cause changes in the populations´ size. These could be the cases of competition, predation, parasitism, mutualism, and etcetera.

- Ecosystem: Basic interaction unit between population and environment that turn in complex relations existing between living and non-living elements in a given area. In the example, interactions between recovering vegetation and soil properties, as non-living elements.

5 0

3 years ago