Each individual blastomere of an early-stage embryo is considered to be totipotent. However, there is a “critical mass” requirement for an embryo to develop into a viable offspring. Explain why. Explain how a synchronous and/or uneven cleavage leads to early differentiation into inner cell mass and trophoblast tissue. If you […]

Using the LTC 501 and 502 manuals as resources, create a 17+ slide presentation using the topics below (15 slides for content, plus a title slide and at least one slide for references/appendices). Your final presentations will be at least 17 slides, including the title page and reference page. Please […]

Q. In tomatoes, stem colour and fruit colour are determined by two independently assorting genes. At one gene, purple stem (P) is dominant to green stem (p). At the other gene, yellow fruit (Y) is dominant to red fruit (y). Consider a cross between two tomato plants heterozygous for both […]

In rumbunnies, sober is an autosomal recessive gene in which the rumbunnies are unable to utilize alcohol. Mating success in rumbunnies is a function of alcohol consumption so that sober individuals have only 75% as many offspring as normal rumbunnies. Assuming that the initial frequencies of S and s are […]