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azamat
3 years ago
13

If after several rounds of artificial selection all alleles affecting the trait are fixed or lost, the narrow-sense heritability

(h^{2}) of a trait is
Biology
1 answer:
Leviafan [203]3 years ago
8 0

Answer:

h^2 = 0

Explanation:

When trait variance is a result of additive genetic factors, it is referred to as 'narrow sense heritability' or h^2. This estimate falls within a range of 0 to 1. h^2 is significant in indicating the evolutionary potential of a certain trait under study. Heritability value close to zero means that the variation in that trait is predominantly a result of environmental factors.

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Ralph has type B blood and his wife Rachel has type A blood. They are very shocked to hear that their baby has type O blood, and
Cerrena [4.2K]

Answer:

1. The parents genotypes could have been BO and AO

2. wire-hair

Explanation:

There are four possible blood types which are type A, B, AB, O. blood group is the classification of blood based on the presence or the absence of inherited antigenic substances on the surface of the red blood cells. They have hereditary basis and also rely on a series of alternative genes sometimes used in solving dispute of parental heritage. With the four possible blood groups, there are six possible genotypes and these are:

Blood type               possible genotypes

Type A                         AA, AO

Type B                         BB, BO

Type AB                           AB

Type O                              OO

Thus, for parents with blood type B and A to give birth to a child with blood type O, it means their genotype could have been both BO and AO  for them to be able to produce a child with OO. a cross between these two could give rise to OO.

Question 2

Wire hair is dominant (S) to smooth (s), thus wire hair could be in the homozygous (SS) and heterozygous form (Ss) and the smooth hair can only be expressed in the homozygous recessive form (ss).

thus, in a cross between homozygous wire haired and smooth haired, we will have:

homozygous wire haired            homozygous smooth haired

P gen              SS                x               ss

F1 gen.                                Ss

phenotype:                     wire haired

8 0
3 years ago
Saturated fats are those fats that become _____ at room temperature and that are typically made from ______ ______ (3)?
umka2103 [35]

Answer:

Saturated fats are those fats that become solid at room temperature

7 0
2 years ago
A population of 500 rabbits lives in an area that is 25 square miles. What is
r-ruslan [8.4K]

Answer:

20 rabbits/square mile

Explanation:

No. of rabbits = 500

Area = 25 square miles

Density = 500/25

= 20 rabbits/square mile

7 0
2 years ago
Internal membrane connected to the external membrane where energy production may occur and which may help cell division
Paha777 [63]
Mitochondria are unusual organelles. They act as the power plants of the cell, are surrounded by two membranes, and have their own genome. They also divide independently of the cell in which they reside, meaning mitochondrial replication is not coupled to cell division. Some of these features are holdovers from the ancient ancestors of mitochondria, which were likely free-living prokaryotes.
4 0
3 years ago
Why is the changeable nature of models considered a limitation?
Gala2k [10]

The changeable nature of models is considered a limitation because when the model alters, the answers that were achieved from the model may also transform.<span> <span>What this means is that outcomes that’s been extracted from changeable models can be true at a certain moment, place or situation, but the conclusions may not be objectively true.</span></span>

8 0
3 years ago
Read 2 more answers
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