All categories

3 years ago

Black fur in mice (

1 answer:

5 0

The answer is D) 1/2.

Let's imagine that two genes of the genotype can be analysed separately.

Black fur is determined by dominant allele B. In this case, parents Bb and BB will give offspring with only brown fur:
Parents: Bb x BB
Offspring: BB BB Bb Bb
Both homozygous (BB) and heterozygous (Bb) offspring will have black fur.

On the other hand, long tails are determined by recessive allele t. Parents Tt and tt will have 50% offspring with short tail and 50% offspring with long tail:
Parents: Tt x tt
Offspring: Tt Tt tt tt
Heterozygous offspring (Tt) will have short tail, and homozygous offspring (tt) will have a long tail.

So, the offspring will definitely have black fur and will not affect the fraction of the offspring with black fur and long tails from the cross of BbTt × BBtt. But, there will be 2 out of 4 offspring with short tails which is 50% or 1/2.

You might be interested in

Three phosphate groups are linked to a ribose sugar which, in turn, is linked to a pyrimidine base known as adenine; this phrase

slamgirl [31]

Answer:

ATP

Explanation:

Adenosine triphosphate (ATP). This nucleotide is very essential in the cell. It is the main source of energy in a cell and is utilized in many biological processes by the cell.

4 0

3 years ago

The property of water that allows the basilisk lizard to run across its surface is.

Sindrei [870]

Answer:

High surface tension caused by the polar quantities of water.

6 0

1 year ago

Remoras are fish that attach themselves to sharks. They travel with the shark and eat leftover shark food. This neither harms no

g100num [7]

Answer:

B) commensalism

Explanation:

The symbiotic relationship between Remoras and sharks is a commensalism relationship where the the shark neither benefit nor loss from such relationship

Commensalism relationship is a relationship in which the one of the living organism benefits from associating with another organism (host organism). The commensal organism benefits such things as locomotion, food, shelter etc.

The host organism neither benefit nor get harmed

From the question, Remoras are the commensal organism while sharks are the host organism

3 0

2 years ago

Which Lane contains the longest DNA fragment. Lane 1 Lane2 Lane3 Lane4

Elena-2011 [213]

Answer:

the answer is :

Lane 3 contains the longest DNA fragment

6 0

2 years ago

Read 2 more answers

Animal and Plant Cell Organelles Use the drop-down menus to determine where these organelles can be found. Ribosome Endoplasmic

rjkz [21]

Answer:

Animal Cell:

Ribosome, Endoplasmic reticulum, Golgi apparatus, small Vacuoles, Lysosomes, Mitochondria, Cell membrane, Cytoplasm.

Plant Cell:

Ribosome, Endoplasmic reticulum, Golgi apparatus, Cell wall, Big Vacuole, Lysosomes, Mitochondria, Cell membrane, Cytoplasm, Chloroplasts.

Explanation:

 Animal Cells Vegetable Cells

Cell wall NO YES

Vacuoles YES, Small and more than ones YES, Only one and big

Chloroplast NO YES

Plasmatic membrane YES YES

Mitochondria YES YES

Lysosomes YES YES

Endoplasmic reticulum YES YES

Golgi apparatus YES YES

Cytoplasm YES YES

Ribosome YES YES

Both the animal and plant cells are eukaryotic. They carry their genetic material in the nucleus and mitochondria. Organelles are located in the cytosol, and both of them are surrounded by a protector cell membrane.

However, they have some differences:

Cell wall: A rigid structure that provides support and protection.

Animal cells do not have a cell wall. They are only surrounded by the cell membrane, which is flexible, so they can adopt different shapes.
Plant cells have a wall, so their shape is usually prismatic and regular. The cell wall is composed mainly of cellulose.

Chloroplast: these are organelles that accumulate chlorophyll.

Animal cells do not have chloroplasts because they do not photosynthesize.
Plant cells have chloroplasts, and they are in charge of the photosynthesis process that allows plants to release oxygen. These organelles use solar light as the source of energy.

Vacuoles:

Animal cells have many and small vacuoles whose function is to store water, ions, and waste intracellular substances.

Plant cells have a unique big-sized vacuole that might occupy almost 90% of the cell. Their principal function is to store water and keep the turgidity. When the vacuole gets empty, the plant loses rigidity.

Other differences are:

The animal cell has centrioles, while the vegetable cell does not.

Plasmodium, chromoplasts, and glyoxysomes are present in the vegetable cell but not in the animal cell.

3 0

2 years ago