Flies Assortment

Flies Assortment

Which organism did Mendel utilize to work out the laws of segregation and independent assortment?

a. the fruit fly

b. Neurospora

c. the garden pea

d. the chicken

e. E. coli

C
The Law of Segregation, also known as Mendel's First Law, essentially has four parts.

Alternative versions of genes account for variations in inherited characteristics. This is the concept of alleles. Alleles are different versions of genes that impart the same characteristic. For example, each human has a gene that controls eye color, but there are variations among these genes in accordance with the specific color the gene "codes" for.
For each characteristic, an organism inherits two alleles, one from each parent. This means that when somatic cells are produced from two gametes, one allele comes from the mother and one from the father. These alleles may be the same (true-breeding organisms/homozygous), or different (hybrids/heterozygous).
If the two alleles differ, then one, the allele that encodes the dominant trait, is fully expressed in the organism's appearance; the other, the allele encoding the recessive trait, has no noticeable effect on the organism's appearance. In other words, only the dominant trait is seen in the phenotype of the organism. This allows recessive traits to be passed on to offspring even if they are not expressed. Not all traits have a dominant-recessive relationship, however. The "Japanese wonder flower" Mirabilis jalapa illustrates incomplete dominance . There is also codominance e.g. Human blood types where A and B are codominant and O is recessive.
The two alleles for each characteristic segregate during gamete production. This means that each gamete will contain only one allele for each gene. This allows the maternal and paternal alleles to be combined in the offspring, ensuring variation.
The Law of Independent Assortment, also known as Mendel's Second Law, states that the emergence of one trait will not affect the emergence of another. While his experiments with mixing one trait always resulted in a 3:1 ratio between dominant and recessive phenotypes, his experiments with mixing two traits (dihybrid cross) showed 9:3:3:1 ratios . Mendel concluded that different traits are inherited independently of each other, so that there is no relation, for example, between a cat's color and tail length. This is actually only true for genes that are not linked to each other.

Fire Fly: Fun, Flashing Toothbrush Inspires Kids to Brush Longer

Los Angeles, CA

Getting kids to brush for the dentist-recommended two minutes has always been a challenge. Now, the FIRE FLY TOOTHBRUSH by DR. FRESH , which lights up and blinks for one minute, has made teeth brushing fun, so kids will do it longer!

Dental professionals will tell every parent that the biggest challenge when it comes to kids’ oral care habits is the rush to brush. Two minutes – one minute on the uppers and one minute on the lowers - is the recommended time it takes to properly brush. However, kids will most often give their teeth a few ineffective scrubs, spit and that’s it. Consequently, the FIRE FLY by DR. FRESH , a bright and sparkly children’s toothbrush that lights up and flashes for one minute, is inspiring kids everywhere to brush longer.

Some facts about FIRE FLY TOOTHBRUSH by DR. FRESH

• Attracts kids because it is bright, sparkly and innovatively shaped
• LCD light in handle incorporates “blinking technology” to flash brightly for one minute when base is pressed
• Separate 60-second cycles promote habit of one solid minute brushing upper teeth, one minute lower teeth
• Developed for ages 3-12
• Soft nylon strands are individually end-rounded to prevent microscopic cuts to gums
• Soft, yet strong enough to bend immediately back into shape
• Number One-selling brand toothbrush sold at Target
• Handle ergonomically designed for child’s hand
• End cap is securely attached to handle and can’t be pulled off
• Designed for 200 uses – reminds kids and parents to replace toothbrush every 3 months as recommended by dentists
• Available in assortment of translucent colors
• SRP $.98 at mass merchandise stores including Target, Wal-Mart, Walgreens, and Big-Lots

 

Backed by extensive research and development, this soft bristle toothbrush contains an LCD light that incorporates “blinking technology,” flashing for 60-seconds when pressed at the base. The Fire Fly allots for one-minute upper and one-minute lower teeth brushing, separating the cycles to ensure that kids get into the pattern of one solid minute on each arch.

“The Fire Fly is one of the best devices we have found to increase child compliance with brushing,” states Dr. Steven J. Brattesani of San Francisco. “It turns brushing into a game with obvious benefits for children and parents alike.”

This irresistible toothbrush is a steal at $.98. Taking the oral care category by storm, the Fire Fly is the Number One-selling brand toothbrush sold at Target. Reflecting a professional “stamp of approval,” over 1,500 dentists nationwide offer the Fire Fly in their practices.

Gentle for kids ages 3-12, the Fire Fly’s nylon strands are individually end-rounded to prevent microscopic cuts to the gums. They are soft enough to be safe, yet they bend immediately back into shape after use.

With a handle that is ergonomically designed for a child’s hand, the Fire Fly is durable. The end cap containing the light is securely attached onto the handle and cannot be pulled-off.

The toothbrush is specifically designed for 200 usages. This encourages kids and parents to replace the toothbrushes every 3 months, as recommended by dentists.

The Fire Fly is available in an assortment of great sparkly translucent colors (clear, blue, green, pink and red) for an SRP $.98 at mass merchandise stores including Target, Wal-Mart, Walgreens, and Big-Lots. The Fire Fly is a product of Dr. Fresh Inc., located in Buena Park, CA. Dr. Fresh manufactures a host of popular and affordable oral care and personal health products.

About the Author

Dr. Fresh offers quality personal care products from its top-selling Firefly flashing toothbrush for kids to disposable floss piks . Dr. Fresh is located in Buena Park, CA. For more information, please contact Megan Brown at (323)650-2201 or at lightyearsahead@sbcglobal.net

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Tagged with: did mendel work with fruit flies • independant assortment problems fruit flies • rod • which organism did mendel utilize to work out the laws of segregation and independent assortment? a. the fruit fly b. neurospora c. the garden pea d. the chicken e. e. coli