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2 years ago

A species has a better chance of surviving if it has greater variation in its

Biology

1 answer:

Lilit [14]2 years ago

8 0

Answer:

size?

Explanation:

I do not really know, I am not in this unit at all

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a yellow female labrador retriever was mated with a brown male. half of the puppies were brown, and half were yellow. explain ho

ASHA 777 [7]

Answer:

There are two alleles, the recessive yellow allele and the dominant brown allele. The female is hom0zygous recessive while the male is heterozygous, this means that half of their children will be hom0zygous recessive and be yellow. The other half will be brown and heterozygous, meaning they have a yellow allele and a brown allele. If the female mated with a hom0zygous dominant male, then all of their offspring will end up being heterozygous and brown.

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2 years ago

Most genetic diseases cannot be cured, but they usually can be treated. Please select the best answer from the choices provided.

mafiozo [28]

Answer:

True

Explanation:

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1 year ago

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How are the tongue, ears, and nose a part of the nervous system?

Tanya [424]

A. <span>They are sense organs that are part of the central nervous system.</span>

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2 years ago

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Biology students used raw eggs in an experiment on tonicity and osmosis. The students put their eggs into vinegar to remove the

creativ13 [48]

Vinegar will also go inside of the egg due to it having a higher concentration of water than the egg does via osmosis.

I hope this answer helped! If you get the chance and you found this answer worthwhile, could you drop a Brainliest? I need four more before I can reach my next level :)

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2 years ago

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In humans, being a tongue roller (R) is dominant over non-roller (1). A man who is a non-roller marries a woman who is heterozyg

mr_godi [17]

Answer:

This question is incomplete, the complete part of the question is as follows:

1. Father’s phenotype _______ Father’s genotype ______

2. Mother’s phenotype ________ Mother’s genotype _______

3. What is the probability of this couple having a child who is a tongue roller?

- Father's phenotype is NON-ROLLER, while his genotype is rr.

- Mother's phenotype is ROLLER while her genotype is Rr

- The probability of this couple having a child who is a tongue roller is 50% or 1/2.

Explanation:

This question involves a single gene coding for the ability or not to roll the to tongue in humans. The alelle for tongue roller (R) is dominant over the allele for non-roller (r). This means an heterozygote individual (Rr) will be able a tongue roller.

According to this question, a man who is a non-roller (rr) marries a woman who is heterozygous for tongue rolling (Rr) i.e. rr × Rr. The following gametes will be produced by each parent:

rr - r and r

Rr - R and r

Using these gametes in a punnet square (see attached image), the following proportion of offsprings will be produced:

Rr, Rr, rr and rr

- Offsprings with genotype Rr (1/2 or 50%) will be tongue rollers

- Offsprings with genotype rr (1/2 or 50%) will be non-tongue rollers.

Hence, based on this question;

- Father's phenotype is NON-ROLLER, while his genotype is rr.

- Mother's phenotype is ROLLER while her genotype is Rr

- The probability of this couple having a child who is a tongue roller is 50% or 1/2

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2 years ago