The WBCs (white blood cells) also known as leucocytes or leukocytes, refers to the cells of the immune system, which takes part in safeguarding the body against both the foreign invaders and the infectious disease. All the WBCs are obtained and generated from the multipotent cells in the bone marrow called hematopoietic stem cells. These cells are found all over the body, including the lymphatic system and the blood. The white blood cells are further differentiated into the five main kinds, that is, the eosinophils, neutrophils, lymphocytes, basophils, and monocytes. These kinds are differentiated by their functional and physical features. Lymphocytes are found more usually in the lymphatic system in comparison to the blood. These primarily comprise of two kinds of cells, that is, the B cells and the T cells.

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Question 1 In a population of Jackalopes (pictured below), horn length will vary between 0.5 and 2 feet, with the mean length somewhere around 1.05 feet. You pick Jackalopes that have horn lengths around 1.75 feet to breed as this appears to be the optimal length for battling other Jackalopes for food. After a round of breeding, you measure the offsprings' mean horn length is 1.67. What is the heritability of horns length (h2)? Is Jackalope horn length a heritable trait? (4 pts)? 12pt v Paragraph BIU A ✓

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Chapter 23.3, Problem 13A

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Introduction:

The WBCs (white blood cells) also known as leucocytes or leukocytes, refers to the cells of the immune system, which takes part in safeguarding the body against both the foreign invaders and the infectious disease. All the WBCs are obtained and generated from the multipotent cells in the bone marrow called hematopoietic stem cells. These cells are found all over the body, including the lymphatic system and the blood.

The white blood cells are further differentiated into the five main kinds, that is, the eosinophils, neutrophils, lymphocytes, basophils, and monocytes. These kinds are differentiated by their functional and physical features. Lymphocytes are found more usually in the lymphatic system in comparison to the blood. These primarily comprise of two kinds of cells, that is, the B cells and the T cells.

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Question 1 In a population of Jackalopes (pictured below), horn length will vary between 0.5 and 2 feet, with the mean length somewhere around 1.05 feet. You pick Jackalopes that have horn lengths around 1.75 feet to breed as this appears to be the optimal length for battling other Jackalopes for food. After a round of breeding, you measure the offsprings' mean horn length is 1.67. What is the heritability of horns length (h2)? Is Jackalope horn length a heritable trait? (4 pts)? 12pt v Paragraph BIU A ✓

Frequency of allele A1 Question 2 The graph below shows results of two simulations, both depicting the rise in frequency of beneficial allele in a population of infinite size. The selection coefficient and the starting frequency are the same, but in one simulation the beneficial allele is dominant and in the other it is recessive. Neither allele is fixed by 500 generations. 1.0 1 0.8 0.6 0.4 2 0.2 0 0 100 200 300 400 500 Generation (a) Which simulation shows results for a dominant and which shows results for a recessive allele? How can you tell? (4 pts) (b) Neither of the alleles reaches fixation by 500 generations. If given enough time, will both of these alleles reach fixation in the population? Why or why not? (3 pts) 12pt Paragraph BIU AT2v V

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