Reproduction Test Flashcards by Chelsi Perkins

Q

Autosome

A

First 22 pairs

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Q

Haploid

A

n

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Q

Somatic cells

A

Normal body tissue cells

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Q

Genotype

A

Genetic makeup, “what you are”

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Q

Mutation

A

Nondisjunction in haploid cells

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Q

Karyotype

A

Arrangement of chromosomes

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Q

Race

A

Geographical gene/trait variation

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Q

Mitosis

A

Division of cells into daughter cells with full sets of chromosomes

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Q

Chromatid

A

strand of DNA

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Q

Centromere

A

connects chromatids

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Q

Cleavage

A

increasing cell number without increasing size

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Q

ICM

A

mass of cells –> fetus

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Q

Corona Radiata

A

layer of follicular cells, surrounds ovum

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Q

Chorion

A

protects embryo

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Q

Graafian follicle

A

mature ovulated ovum

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Q

Trilaminar disc

A

day 7-14, 3 germ layers –> body systems

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Q

Colostrum

A

first milk

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Q

Ectopic

A

egg implants outside uterus

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Q

Breech

A

baby head ^

Q

Cells of leydig

A

produce/secrete testosterone in seminiferous tubules

Q

Seminiferous tubules

A

coil within testes, spermatogenesis

Q

Dartos

A

connective tissue on shaft and scrotum

Q

Meiosis

A

produces sex cells, splits number of chromosomes present in have, 4 gamete cells produced

Q

Sex chromosome

A

23rd pair, xx or xy

Q

Diploid

A

2n

Q

Sex cels

A

gametes, DNA shows only mom or dad, n

Q

Chromosome

A

made of protein and DNA

Q

Allele

A

dominant/recessive, 2 = trait

Q

Phenotype

A

what you look like

Q

Inbreeding

A

incest

Q

Sex-linked trait

A

hemophilia, color blindness

Q

Heterosis

A

traits enhanced by mixing parents’ genes

Q

Eugenics

A

controlled breeding

Q

Blastocyst

A

ICM and trophoblast implanted in uterus

Q

Trophoblast

A

develops placenta

Q

Zona pellucida

A

fluid around ovum

Q

Amnion

A

inner membrane around embryo

Q

Morula

A

hollow ball of cells

Q

Parturition

A

birth

Q

Areola

A

surrounds nipple, helps eject milk

Q

Afterbirth

A

placenta expelled from body

Q

Glans

A

penis tip

Q

Tunica

A

testes covering

Q

Erectile tissue

A

3 masses, corpus cavernosum and corpus spongiosum

Q

sertoli cells

A

‘nurse cells’ in seminiferous tubules

Q

Spermatogonium

A

1st stage of spermatogenesis

Q

Cremaster muscle

A

Pulls testes toward body