53. 1. During meiosis, a hexaploid hybrid spontaneously eliminates one set of ch

Question

53.

1. During meiosis, a hexaploid hybrid spontaneously eliminates one set of chromosomes (eliminates 1n). What is the most likely result of this deletion?

The hybrid will no longer be polyploid.

a. The hybrid will be able to reproduce sexually.

b. The hybrid will no longer be able to reproduce.

c. The hybrid will be able to reproduce with one of the parental species.

64.

Canola (Brassica napus) is a product of a cross between B. rapa [2n = 20, (AA)] and B. oleracea [2n = 18, (CC)]. The genome of B. napus is

2n = 19 (AACC).

a. 2n = 19 (AC).

b. 2n = 38 (AACC).

c. 2n = 38 (AC).

70.

In addition to Tbx5, Hox genes may also regulate vertebrate limb development. Choose the evidence supporting that Hox genes affect limb development in vertebrates. Check all that apply.

a. Polydactyl humans (fused fingers) often exhibit abnormalities in Hox gene expression.

b. Fish express the same Hox gene during fin development as chicks do during leg development.

c. Hox genes are absent in reptiles.

d. Hox genes regulate some of the same genes as Tbx5 does.

71.

What type of genes would be most likely to exhibit different expression patterns between humans and non-human primates, such as gorillas?

a. genes controlling lung development

b. genes controlling mammary gland development

c. genes controlling heart development

d. genes controlling brain development

Explanation / Answer

2) b. 2n = 38 (AACC).

It is an amphidiploid having a complete diploid chromosome set from each parent .

3)

b. Fish express the same Hox gene during fin development as chicks do during leg development.

c. Hox genes are absent in reptiles.

4). d. genes controlling brain development

Related Questions

Navigate

• Browse (All)
• Browse 5
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.