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3 years ago

Define a branch point (also called a node) on a phylogenetic tree and describe what it represents.

1 answer:

4 0

In a rooted phylogenetic tree, each node ... phylogenetic tree that explicitly represents evolutionary time through its branch spans. A spindle diagram (often called

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To construct a mapping cross of linked genes, it is important that the genotypes of some of the gametes produced by the heterozy

FrozenT [24]

Answer:

False.

Explanation:

Linked genes are the genes that are present on the same chromosome and can undergo the process the recombination. The recombinant progeny are obtained by the crossing of the linked genes.

The recombinant frequency and map distance can be deduced by the mapping of the linked genes. The genotype of the heterozygote cannot be deduced by examining phenotype and sometimes the recombinant progeny is completely different from the parents as well as from the heterozygotes.

Thus, the correct answer is false.

7 0

3 years ago

In corn, small pollen (sp) is recessive to normal pollen (sp+) and banded necrotic tissue, called zebra necrotic (zn), s ssive t

alex41 [277]

Answer:

Option B

Explanation:

Please see the attached image

Given -

Allele for small pollen is "sp"

Allele for normal pollen is "sp+"

and "sp+" is dominant over "sp"

Allele for zebra necrotic tissue is "zn"

Allele for normal necrotic tissue is "zn+"

and "zn+" is dominant over "zn"

Cross is carried out between

sp+ sp zn+ zn x sp+ sp zn+ zn

The gametes of the parent cells are -

sp+ zn+, sp+zn, spzn+, spzn

The cross would be as follows

sp+ zn+ sp+zn spzn+ spzn

sp+ zn+ sp+ sp+ zn+ zn+sp+ sp+ zn+ znsp+ sp zn+ zn+ sp+ spzn+ zn

sp+zn sp+ sp+ zn+ znsp+ sp+ zn znsp+ sp zn+ zn sp+ sp zn zn

spzn+ sp+ sp zn+ zn+sp+ sp zn+ znsp sp zn+ zn+ sp sp zn+ zn

spzn sp+ sp zn+ zn sp+ sp zn zn sp sp zn+ zn sp sp zn zn

Hence, option B is correct

7 0

3 years ago

Weather balloons are often used to make measurements in which "sphere" A.Biosphere B.Exosphere C.Geosphere D.Cryosphere E.Atmosp

Ivahew [28]

I think it would be E.

3 0

3 years ago

Water is essential for life on Earth. Which property of water is the primary reason water is able to transport substances to and

alexgriva [62]

I'm not sure if there are answer choices, but water is an excellent solvent, taking along valuable nutrients with it when it travels.

7 0

3 years ago

When you bring any of your fingers in contact with your thumb, this movement is called __________.when you bring any of your fin

vladimir2022 [97]

Answer:

Opposition

Explanation:

Opposition is the type of movement that is only for the hands. Opposition is them movement where you bring your finger/s in contact with your thumb. When you put it back to its anatomical position, which is beside the index finger (pointing finger) this is called <em>reposition.</em>

Retraction occurs in the scapula (Shoulder blades) and mandible (jaw). Dorsiflexion you see that happen in your foot. When you bring your toes closer to the shin. Supination is more on the forearm and foot, where you rotate it so your palms are facing forward (sole facing the other ankle for feet). Flexion is the movement of body parts where you bring them closer to each other at a joint (the angle between the two parts are lessened). Like when you bend your elbows to "flex" muscles.

8 0

3 years ago