—-can affect the amount of precipitation an area receives by causing the

Which most likely appears brightest from Earth?

evablogger [386]

The sun appears more ob earth

7 0

3 years ago

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describe why it is essential for DNA to replicate prior to cell division. What would happen otherwise

AlexFokin [52]

Because the cells always diverted when break down

8 0

4 years ago

In Drosophila, an autosomal gene determines the shape of the hair, with B giving straight and b giving bent hairs. On another au

klasskru [66]

Answer:

a. F1 genotype : IiBb F1 phenotype : Hairless

F2 genotype and phenotype :

I_B_ (hairless), iiB_ (straight), iibb (bent)

b. IiBb X iiBb

Explanation:

a. Fly 1 : pure breeding straight haired : iiBB

Fly 2 : pure breeding hairless with bent genotype : IIbb

Fly 1 X Fly 2 : iiBB X IIbb = IiBb (F1)

All the offspring will be hairless since there is one dominant I allele which will inhibit hair production regardless of the type of allele of other gene.

Two F1 flies will be crossed to obtain F2 flies. IiBb X IiBb :

I_B_ : hairless = 9

I_bb : hairless = 3

iiB_ : straight hair = 3

iibb : bent hair = 1

Hairless : straight : bent will be in 12 : 3 : 1 ratio.

b. The offspring of this cross :

hairless : I_ _ _

straight : iiB_

bent : iibb

There is a bent offspring which has both the recessive alleles of both the genes. Hence it must have obtained the two alleles from the two parents. So their genotype is _i_b and _i_b.

Half of the offspring are hairless as given by the ratio. This is only possible if the cross is between Ii and ii fly:

I i

i Ii ii

So the genotype is Ii_b and ii_b.

The remaining hairy flies are in 3:1 ratio of straight to bent. This is only possible if the cross is between Bb and Bb fly:

B b

B BB Bb

b Bb bb

So the final genotype of the flies is IiBb and iiBb.

4 0

4 years ago

Which one of the following molecules would be most likely to travel by facilitated diffusion? A. sodium ions B. glucose C. oxyge

valkas [14]

Answer:

The correct answer is : the sodium ion and glucose both shows the facilitated diffusion.

Explanation:

Facilitated diffusion is form of diffusion of molecules of solutes with the help of transport proteins along their concentration gradient on the plasma membrane, however it is a passive transport as its does not require energy to move in or out of cell.

Oxygen can move through the membrane directly by simple mean of diffusion. however, Other molecules like amino acids, ions, glucose and many more need a integral pore, channel or transport molecule to pass through the membrane or with facilitated diffusion.

Glucose transporters involves to help in movement of glucose through the membrane along the concentration gradient it shows facilitated diffusion. Sodium ions also move through along concentration gradient by protein channels formed by transport proteins through hydrophobic membrane.

Thus, the sodium ion and glucose both shows the facilitated diffusion.

6 0

3 years ago

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In a flowering plants species, red flower color is dominant over white flower color. What is the genotype of any white-flowering

katovenus [111]

Explanation:

C. A red allele is present on both homologous chromosomes

Homologous chromosomes are pairs of chromosome of similar lengths, banding patterns, and centromere positions, with genes at the same loci. For dominance, gene copies are present on both of the chromosomes; the dominat variant overrides the effect of the other recessive allele.

Further Explanation:

DNA molecules contain chromosomes that may have different forms called alleles. DNA, which is the genotype, is transcribed into mRNA and later translated into amino acids which are connected together by rRNA to form proteins which constitute the phenotype of an organism. DNA sequence mutations form new alleles, impacting the associated mRNA, and thus the encoded protein.

Homozygous individuals have a chromosome containing two variants of the same allele. Dominant homozygous individuals bear two copies of the dominant allele, whereas recessive homozygous individuals hold two copies of the recessive allele.

Learn more about mutations at brainly.com/question/4602376

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

#LearnWithBrainly

6 0

3 years ago

—-can affect the amount of precipitation an area receives by causing the—- effect.