BSC 197 Lecture Notes - Lecture 18: Centromere, Cleavage Furrow, Mendelian Inheritance

18 views5 pages

mauveyellowjacket6

29 Dec 2016

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Living organisms are distinguished by their ability to reproduce their own kind. Genetics is the scienti c study of heredity and variation. Heredity is the transmission of traits from one generation to the next. Variation is demonstrated by the differences in appearance that offspring show from parents and siblings. Genes are the units of heredity, and are made up of segments of dna. Genes are passed to the next generation through reproductive cells called gametes (sperm and eggs) Each gene has speci c location called a locus on a certain chromosome. In asexual reproduction, one parent produces genetically identical offspring of mitosis. A clone is a group of genetically identical individuals from the same parent. In sexual reproduction, two parents give rise to offspring that have unique combinations of genes inherited from the two parents. The sex chromosomes are called x and y: females are xx and males are xy.

Related Questions

there could be more than one answer or no answer at all

1. _____ Females that reproduce sexually versus asexually are said to incur a âtwo-fold cost of sexual reproduction.â Which of the following costs are associated with sexual reproduction for females?

A) MALES! That do-nothing lot really does not directly contribute offspring to the next generation. Females would be better off making all daughters.

B) FEMALES! In most natural settings, those daughters compete with their mothers for potential mates and resources needed to successfully reproduce.

C) MITOSIS! Since sexual reproduction can produce many more offspring than asexual reproduction, there are energetic costs associated with the mitotic divisions required to produce those offspring.

D) MEIOSIS! Every time a gamete is produced, the parent loses a little bit of itself. Half to be precise since only half of its genes are passed on to sexually produced offspring.

E) DIVERSITY! Mothers maximize fitness if all offspring are genetically just like them. Sexual reproduction causes genetic diversity, which ultimately lowers the fitness of both parents.

What type of daughter cells are produced during meiosis?

A. genetically distinct due to crossing over

B. genetically identical to the mother cell

C. genetically identical to each other

D. genetically aneuploids

What is NOT a benefit of asexual reproduction compared to sexual reproduction?

A. The offspring will be as successful in the habitat as the parent.

B. all members of the population can reproduce themselves

C. The only source of variation in the next generation is mutation.

D. They do not require another organism of the opposite sex.

In what phase of meiosis does Independent assortment of homologous chromosomes occur?

A. meiosis I

B. interphase

C. cytokinesis

D. meiosis II

In what phase of meiosis does Independent assortment of homologous chromosomes occur?

A. meiosis I

B. interphase

C. cytokinesis

D. meiosis II

Just to keep you in practice, a couple of the much beloved multiple multiple choiceâ¦

1. An increase in CO₂ levels in the blood directly or indirectly causes which of the following?

A) an increases in ventilation rate

B) a decrease in the pH

C) a decrease in hemogloginâs binding affinity for O₂

D) a decrease in the O₂ levels in the blood

E) an immediate increase in the number of red blood cells found in the blood stream

2. _____ Females that reproduce sexually versus asexually are said to incur a âtwo-fold cost of sexual reproduction.â Which of the following costs are associated with sexual reproduction for females?

A) MALES! That do-nothing lot really does not directly contribute offspring to the next generation. Females would be better off making all daughters.

B) FEMALES! In most natural settings, those daughters compete with their mothers for potential mates and resources needed to successfully reproduce.

C) MITOSIS! Since sexual reproduction can produce many more offspring than asexual reproduction, there are energetic costs associated with the mitotic divisions required to produce those offspring.

D) MEIOSIS! Every time a gamete is produced, the parent loses a little bit of itself. Half to be precise since only half of its genes are passed on to sexually produced offspring.

E) DIVERSITY! Mothers maximize fitness if all offspring are genetically just like them. Sexual reproduction causes genetic diversity, which ultimately lowers the fitness of both parents.

BSC 197 Lecture Notes - Lecture 18: Centromere, Cleavage Furrow, Mendelian Inheritance

Document Summary

Get access

Related Documents

BSC 197 Lecture Notes - Lecture 20: Gamete, Centimorgan, Fundamental Theorem Of Arithmetic

BSC 197 Lecture Notes - Lecture 17: Spindle Apparatus, Centrosome, Telophase

BIO152H5 Lecture Notes - Lecture 5: Genetic Variation, Ploidy, Multicellular Organism

Related Questions