Most of the genetic diversity in a population of animals comes from which of the following? Crossing over plus random fertilization Independent assortment plus random fertilization Random fertilization Binary fission

In fruit flies, the wild type (red) eye colour is dominant to white eye colour. This gene is carried on the X chromosome. The allele for wild type body colour is dominant to ebony body colour. This gene is carried on the autosome. A wild type female fruit fly that is homozygous for both traits mates with a male fruit fly with white eyes and ebony body colour. What phenotypic ratio would be expected in their offspring? Ratio: A female with red A female with white A male with red A male with white Phenotype: eyes and wild type eyes and ebony eyes and wild type eyes and ebony body colour body colour body colour body colour

In pea plants, the allele for purple flowers (P) is dominant and the allele for white flowers (p) is recessive. The allele for tall plants (T) is dominant and the allele for dwarf plants (t) is recessive. A plant has a PPT genotype. Which of the following is a possible genotype in the gametes (sex cells) produced from this parental plant? O PPTt O PP O Tt O Pt

Hairlessness in dogs is inherited from a single dominant allele. Inheriting two dominant alleles is lethal for the embryo. Penelope, a hairless dog, is wildly attracted to a hairy dog, Arnold. They mate. The probability that Arnold's sperm fertilizing Penelope's oocyte results in a happy, hairless puppy is: O 1/2 O 3/4 O 1/3 Ο 1/4 O 2/3

Sex determination in birds is different from that in humans. The sex chromosomes in birds are called Z and W, because males have two of the same chromosome (ZZ), whereas females have two different chromosomes (ZW). There is a Z-linked allele in some birds that causes the death of the embryo when the normal dominant allele is not present. What would be the sex ratio in the living offspring of a cross between a male heterozygous for the lethal allele and a normal female? A) What are the genotypes of the parents? Male____ Female____ B)  Which gametes would each form? Male____ Female____   C) Draw your Punnett square below and determine the sex ratios of living offspring.

In pea plants, the tall trait is dominant and the recessive trait is short. What is the GENOTYPE ratio of the following offspring? * T TT Tt Tt tt O 3 Tall: 1 Short 3 TT: 1 tt 3 Short: 1 Tall O 1 TT: 2 Tt: 1 t

Describe how genetic variation occurs (discuss events like independent assortment/alignment, crossing over, and random fertilization)

The diagram shows a plant that is heterozygous for two genes. G = yellow; g = green; R = round; r = wrinkled G Four different types of gametes are produced by a heterozygous individual when crossing over occurs, and two different types of gametes are produced when crossing over does not occur. What does this information reveal about crossng over? O Crossing over introduces variety by producing different combinations of alleles. O Crossing over reduces the incidence of DNA and chromosomal mutations. O Crossing over introduces variety in by creating types of genes. O Crossing over maintains the count of genes and the original alleles in both chromosomes. Copyright ©2021 Certica Solutions, Inc. https://encase.te21.com/Assessment/View/fc425cee-df10-4f28-a988-c3calbfa788a/675fd7db-03b1-48af-af8e-f6be62227cd7#

In a particular animal, coat color is under the control of two interacting genes. Each gene has a dominant and recessive allele. A = Color, a = Albino, and B = Brown coat color, b = Red coat color. Two AaBb animals are mated. What proportion of their offspring is expected to be albino? Assume the genes are assorting independently.

In mice, there is an allele that in the heterozygous condition, produces mice with yellow coats. Mice that are homozygous recessive for the allele have white-color coats. Homozygous dominant mice abort early or are born stillborn. If a yellow male is mated to female yellow mouse, what is the phenotypic ratio you would expect among the 15 living offspring? (Show your work below.)