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larisa [96]
2 years ago
14

The movement of molecules across a membrane from an area of higher concentration to an area of lower concentration with the use

of a carrier molecule embedded in the membrane is called _________.
Biology
1 answer:
statuscvo [17]2 years ago
7 0
I believe this is diffusion.
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In humans, the eye color and hair color genes are located on different chromosomes. Brown eyes (B) are dominant to blue (b), and
Andrej [43]

Answer:

Man's genotype: Bbdd

Woman's genotype: bbDd

First child's genotype: Bbdd

Second child's genotype: bbDd

Explanation:

This is a dihybrid cross involving two genes; one coding for eye color and the other for hair color in humans. The allele for brown eye (B) is dominant over the allele for blue eyes (b) in the first gene while the allele for dark hair (D) is dominant over the allele for red hair (d) in the second gene.

According to the question, A man with brown eyes and red hair will possibly possess genotypes: BBdd or Bbdd while a woman with blue eyes and dark hair will possibly have genotype: bbDD or bbDd. Considering the fact that they produced children with recessive traits for both gene (blue eyes and red hair), it means that they are heterozygous for their dominant trait. This means that the ideal genotype for the man is Bbdd since he will produce gametes containing B and b alleles for the first gene while the ideal genotype for the woman is bbDd since it will produce gametes with D and d allele for the second gene.

Hence, a child with brown eyes and red hair will possess genotype: Bbdd since he/she cannot receive two dominant alleles for the first gene from both parents. A child with blue eyes and dark hair will have genotype: bbDd since he/she cannot receive two dominant alleles of the second gene from both parents.

3 0
2 years ago
Who would like to help me with this because I am homeschooled and I do not know 20 people to survey. I have maybe 3 people in my
larisa86 [58]
I would just survey whoever is in my house. And I will be honest I have no idea what the survey is about but obviously your school (k12 maybe?) would not expect you to go around the neighborhood asking random people where their knuckle hair is located. All I can say Is try your best. Hope this helped. XD
7 0
3 years ago
Read 2 more answers
Most mammals have diploid body cells and haploid gametes. During __________, chromosomes from haploid gametes combine, and a ___
BigorU [14]

Answer:

C. or  fertilization, diploid

3 0
3 years ago
Yeast is a fungus and it can die. Bakers proof yeast to make sure it will respond and rise. A student tests different ways to pr
ruslelena [56]
B. Yeast responds to added sugar
4 0
3 years ago
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Where do plants obtain the oxygen necessary to utilize foods? directly from products of photosynthesis from the splitting of wat
IceJOKER [234]

Answer:

from the splitting of water molecule.

Explanation:

The splitting of water molecules  by sunlight is called Photolysis. This is the first reaction in photosynthesis; which occurs by catalysis  of enzymes of Photo system 11.

It involves the splitting of water molecules into;

hydrogen ion/protons.

Oxygen

and electron.

<u> Oxygen is  the by product liberated into the atmosphere, for animals to inhale for the process of cellular respiration</u><u>.</u>This is the source of oxygen fro cellular respiration in animals.

the hydrogen ions combined with electrons from photosystem 1 to reduce NADP .The latter is used to reduce C02  to form carbohydrate in light independent reaction

4 0
3 years ago
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