Sexual reproduction results in: Choose the correct option.

Sexual reproduction involves the fusion of haploid _______ from two parents.

The fusion of gametes forms a _______ zygote, which grows through mitosis.

Meiosis produces haploid cells called _______.

Which process maintains chromosome number and enables genetic diversity? Choose the correct option.

Identify two sources of variation produced during meiosis.

Increased genetic variation drives evolution and adaptability.

What is one evolutionary advantage of sexual reproduction and genetic variation?

Which life-cycle strategy is characterized by a multicellular diploid stage and gametes as the only haploid cells?

Which life-cycle strategy is characterized by a multicellular haploid stage and the zygote as the only diploid stage?

Which life-cycle strategy alternates between multicellular haploid (gametophyte) and diploid (sporophyte) stages?

What process leads to the formation of haploid gametes from diploid germ cells in animals?

Refer to the diagram of the Diploid-Dominant Life Cycle in Animals. What is the result of fertilization?

According to the diagram, which organs are responsible for producing gametes in animals?

In the diploid-dominant life cycle, the zygote is haploid.

What process follows the formation of a zygospore in the life cycle of fungi?

Refer to the diagram of the Haploid-Dominant Life Cycle (Fungi Kingdom). Which of the following is true about the ploidy of the majority of the fungal life cycle?

In the haploid-dominant life cycle of fungi, meiosis occurs after nuclear fusion.

What process leads from the sporophyte to the production of spores?

Refer to the diagram of the Alternation of Generations Life Cycle (Plants & Algae). The fusion of egg and sperm is called _________.

Plants have a life cycle that alternates between a multicellular ________ organism and a multicellular ________ organism.

Meiosis reduces the chromosome number in cells from ______ (two sets) to ______ (one set), preventing chromosome doubling in each generation.

Which stage of meiosis separates homologous chromosomes and reduces the chromosome number by half?

Which stage of meiosis (similar to mitosis) separates sister chromatids, resulting in four genetically unique haploid cells?

What is the stage called where homologous chromosomes are present together in the cell?

During which stage are the chromosomes duplicated?

What are homologous chromosomes?

During which phase of Meiosis I do homologous chromosomes pair up and exchange genetic segments (crossing over)?

Homologous pairs align randomly at the metaphase plate during Metaphase I of meiosis.

What separates during Meiosis II?

Refer to the diagram showing chromosome crossover. What is the result of crossing over between non-sister chromatids of homologous chromosomes?

Which of the following are the two divisions in meiosis?

How many non-identical haploid cells are produced from one diploid parent cell during meiosis?

Meiosis increases genetic diversity through genetic recombination (crossing over) and random assortment of chromosomes.

The diagram showing Anaphase I and resulting gametes demonstrates which principle about chromosome assortment at metaphase I?

What type of division occurs in mitosis?

How many daughter cells are produced in meiosis?

Mitosis maintains the original chromosome number in humans, which is _____

Meiosis reduces the chromosome number by half in humans, from 46n to _____

What is the main purpose of mitosis?

What is the result of meiosis?

The four daughter cells resulting from meiosis are _______ and genetically distinct.

Which process occurs during prophase I of meiosis but does not occur in mitosis?

During which phase does DNA synthesis occur in both mitosis and meiosis?

A karyotype is a laboratory technique used to examine an individual's complete set of _________.

Which of the following is NOT involved in the process of karyotyping?

The main purpose of karyotyping is to detect ________ and ________ chromosomal abnormalities.

Karyotyping assists in diagnosing genetic disorders and understanding their causes.

Karyotyping aids in prenatal screening and fertility assessments.

What are chromosomal abnormalities?

Which of the following is an example of aneuploidy?

Aneuploidy is caused by _________

Structural abnormalities in chromosomes include which of the following?

What chromosomal abnormality is shown in the karyotype with XXY?

What is nondisjunction?

Nondisjunction can occur during both meiosis I and meiosis II.

The risk of Down syndrome in live birth increases most sharply after the female parent's age reaches ____.

The risk of Down syndrome increases with maternal age because:

Males (XY) and females (XX) have different numbers of X chromosomes but function normally.

What is X inactivation?

Random Inactivation: In each cell, either the maternal or paternal X is randomly inactivated.

Once inactivated, all descendant cells keep the same inactive X.

What is Cri-du-chat syndrome associated with?

Cri-du-chat syndrome results from a deletion of most of the small arm of which chromosome?

What is a translocation in genetics?

Translocations are associated with which of the following disorders?

A chromosome segment breaks from the chromosome, reverses its orientation, and then reattaches in the original position. What is the name of this chromosomal change?

Reciprocal translocation occurs between two nonhomologous chromosomes and does not cause any genetic information to be lost or duplicated.

Which chromosomal feature distinguishes humans from chimpanzees on chromosome 18?